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NH
Series

TM

NHTC / NHPC
ELECTRODE
STEAM HUMIDIFIER
Engineering Manual

2538144-B

PROPRIETARY NOTICE
This document and the information disclosed herein are proprietary data of WALTER MEIER LTD.
Neither this document nor the information contained herein shall be reproduced used, or disclosed to
others without the written authorization of WALTER MEIER LTD., except to the extent required for
installation or maintenance of recipient’s equipment. All references to the NORTEC name should be
taken as referring to WALTER MEIER LTD.

LIABILITY NOTICE
NORTEC does not accept any liability for installations of humidity equipment installed by unqualified
personnel or the use of parts/components/equipment that are not authorized or approved by
NORTEC.

COPYRIGHT NOTICE
Copyright 2008, WALTER MEIER LTD. All rights reserved.

SPECIFICATION LABEL LOCATION
The Specification Label for your NH Series humidifier is located on the bottom of the unit. You will
find it attached to the skirt that separates the electrical and plumbing compartments on the electrical
compartment side.

RECORD OF REVISIONS
For each revision, put the revised pages in your manual and discard the superseded pages. Write the
revision number and revision date, date put in manual, and the incorporator’s initials in the applicable
columns on the Record of Revisions.
Revision
Number

2008-10-01

Revision
Date

Date Put
In Manual

By

Revision
Number

Revision
Date

Date Put
In Manual

By

TABLE OF CONTENTS
Subject

Page

10-00 ELECTRODE STEAM ENGINEERING
1.

INTRODUCTION WHY ELECTRODE STEAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PROPORTIONAL + INTEGRAL AUTO-ADAPTIVE CONTROL SYSTEM FOR
THE NHTC/NHPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
B.
NH CAPACITY ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
C.
DRAIN CYCLE AND CYLINDER LIFE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.
PRE-INSTALLATION EQUIPMENT VERIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
A.
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
A.

10-10 HUMIDITY, STEAM ABSORPTION AND DISTRIBUTION
1.
A.
B.
C.
D.
E.
2.
A.
B.
C.
3.
A.
B.
4.
A.
B.
C.
D.
E.
F.
G.
H.
5.
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
6.
A.

HUMIDITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
ESTIMATING THE HUMIDIFICATION LOAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
LOAD CALCULATION SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TEMPERATURE AND HUMIDITY REQUIRED . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TEMPERATURE AND HUMIDITY AVAILABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
INCOMING AIR VOLUME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
STEAM ABSORPTION AND DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
VARIABLES THAT AFFECT ABSORPTION DISTANCES. . . . . . . . . . . . . . . . . . . . 28
CALCULATING THE DOWN STREAM HUMIDITY LEVEL . . . . . . . . . . . . . . . . . . . 30
CONTROL OF DUCT OR PLENUM SATURATION . . . . . . . . . . . . . . . . . . . . . . . . . 31
STEAM RUNS AND CONDESNATE RETURNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
STEAM RUNS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
CONDENSATE RETURN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
STEAM DISTRIBUTORS (ASD, BSD, CSD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
STEAM DISTRIBUTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
DISTRIBUTOR CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
DISTRIBUTOR LOCATIONS AND MOUNTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
MULTIPLE DISTRIBUTOR APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
LOCATION OF STEAM DISTRIBUTORS WITHIN AN AIR HANDLER . . . . . . . . . . 40
DISTRIBUTOR ABSORPTION DISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
TYPICAL APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
DISTRIBUTOR DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
SHORT ABSORPTION MANIFOLD (SAM-e) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
DETERMINING THE STEAM ABSORPTION DISTANCE . . . . . . . . . . . . . . . . . . . . 43
STATIC AIR PRESSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
CONDENSATE LOSSES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
CORRECT CHOICE OF PRODUCT APPLICATIONS (WITHIN SAM-e) . . . . . . . . 46
SAM-e DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
SAM-e HEADER SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
SAM-e STEAM TUBE SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
SAM-e STEAM INLET CONFIGURATION SELECTION . . . . . . . . . . . . . . . . . . . . . 48
MINI SAM-e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
BLOWER PACKS (BOBP, RMBP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
BLOWER PACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2008-10-01

Subject
7.
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.

Page

CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
ON/OFF CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
MODULATING CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
OUTDOOR TEMPERATURE SETBACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
TRANSDUCER SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
POSITIONING CONTROLS AND SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
NORTEC ONLINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
NORTEC LINKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
TYPICAL INSTALLATION LAYOUT FOR NHTC/NHPC . . . . . . . . . . . . . . . . . . . . . 58
NORTEC CONTROLLER DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

10-20 SPECIFICATIONS
1.

HUMIDIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B.
PRODUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.
EXECUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

64
64
64
70

10-30 SUBMITTALS
1.
A.
B.
C.
D.
E.
F.

SUBMITTAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
NH UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
DISTRIBUTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
SAM-e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
BLOWER PACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

WARRANTY

2008-10-01

LIST OF FIGURES
Figure

Page

10-00 ELECTRODE STEAM ENGINEERING
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.

NHTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Optimum Boiling Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical Auto-Adaptive Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Capacity Setting & Cylinder Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Output vs Service Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Typical NHRS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

10-10 HUMIDITY, STEAM ABSORPTION AND DISTRIBUTION
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
Figure 32.

Schematic of a Typical Print Shop HVAC System . . . . . . . . . . . . . . . . . . . . . . 19
Psychrometric Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Steam Distributor Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Condensate Drain Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Proper Slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Drain Tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Steam Line Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Condensate Tee At Any Low Point In Steam Line . . . . . . . . . . . . . . . . . . . . . . . 35
Trap To Prevent Steam In Condensate Line . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Levelling the Distributor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Single Steam Distributor Installation – Minimum Clearance . . . . . . . . . . . . . . . 38
Cutting Duct For Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Humidification Distance Nomogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Best Location for Multiple Steam Distributors . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Roof Top Units 2-20 Tons – Typical Location . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Small Units On Residential Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
SAM-e Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Cross-Section of Distributor Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Absorption Distance – 3" Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Absorption Distance – 6" Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Absorption Distance – 9" Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Absorption Distance – 12" Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
SAM-e Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
SAM-e Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Steam Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Typical SAM-e Installation for Atmospheric Steam Applications . . . . . . . . . . . . 50
NH Series Humidifier With Built-On Blower Pack . . . . . . . . . . . . . . . . . . . . . . . . 51
NH Series Remote Mounted Blower Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Set Point Versus Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
NORTEC OnLine Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
NORTEC Online Configuration Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
NORTEC Links Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

2008-10-01

Figure
Figure 33.
Figure 34.
Figure 35.

Figure 36.

Page
Humidifier Controlled by Air Proving, On/Off Duct Mounted High Limit and
Modulating Wall Mounted Space Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Humidifier Controlled by Air Proving, Modulating Duct Mounted High Limit
and Modulating Wall Mounted Space Controller . . . . . . . . . . . . . . . . . . . . . . . . 61
Humidifier Controlled by Air Proving, Modulating Duct Mounted High Limit
and Modulating Wall Mounted Return Air Sensor with Wall Mounted
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Humidifier Controlled by Air Proving, Duct Mounted High Limit Sensor
and Modulating Duct Mounted Return Air Sensor with Networking Option . . . . 62

10-30 SUBMITTALS
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.

2008-10-01

Low Voltage Control Terminal Strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Primary (Line) Voltage Wiring to Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Physical Data - NHTC/NHPC 005-030 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Physical Data - NHTC/NHPC 050-100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Physical Data - NHTC/NHPC 150-200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Distributor Dimensions (3 Sheets) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
SAM-e General Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
General Mini SAM-e Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
In-Duct/AHU Installation Without Mounting Frame Installation . . . . . . . . . . . . . 87
In-Duct/AHU Installation With Mounting Frame Installation . . . . . . . . . . . . . . . . 88
Outside Duct Installation Without Mounting Frame Installation . . . . . . . . . . . . . 89
Outside Duct Installation With Mounting Frame Installation . . . . . . . . . . . . . . . . 90
Vertical Duct Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Outside Duct Mounting Cover Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Atmospheric SAM-e Adapter Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Atmospheric Steam Header and Adapter Configuration . . . . . . . . . . . . . . . . . . 93
Physical Data for Remote Mounted Blower Pack . . . . . . . . . . . . . . . . . . . . . . . 94
Physical Data Units With Optional Built-On Blower Packs . . . . . . . . . . . . . . . . . 95
Wall Digital Humidistat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Duct Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

LIST OF TABLES
Table

Page

10-00 ELECTRODE STEAM ENGINEERING
Table 1.
Table 2.

Features Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
NHTC/NHPC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

10-10 HUMIDITY, STEAM ABSORPTION AND DISTRIBUTION
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
Table 21.
Table 22.

Outdoor/Indoor Relative Humidity Conversion Chart . . . . . . . . . . . . . . . . . . . . 14
Load Calculation Summary Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Grains of Water Per Cubic Foot – Saturated Air (100% rh) . . . . . . . . . . . . . . . 15
Design Outdoor Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Inside Relative Humidities At Which Moisture Will Condense On Windows . . 21
Regain of Hygroscopic Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Design Indoor Conditions For Various Places, Products and Processes . . . . . . 23
Variables That Affect Absorption Distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Typical Absorption Distances, Single Distributor, 100 lbs/hr Humidifier . . . . . . . 29
Water (lbs/hr) Contained in 1000 CFM of Air . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Steam Line Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Recommended Material and Size for Steam Run . . . . . . . . . . . . . . . . . . . . . . . 33
Recommended Condensate Line at Distributor(s) . . . . . . . . . . . . . . . . . . . . . . . 33
Maximum Recommended Length of Steam Runs . . . . . . . . . . . . . . . . . . . . . . . 34
Air Pressure Loss in AHU/Duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Condensate Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
SAM-e Tube Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Mini SAM-e Headers – 3" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Mini SAM-e Headers – 6" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Mini SAM-e Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Mini Inlet Configurations – For Atmospheric Steam Unit . . . . . . . . . . . . . . . . . . 49
Ceiling and Frontal Clearances for Blower Packs . . . . . . . . . . . . . . . . . . . . . . . 52

10-30 SUBMITTALS
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.

NH Series Unit Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Common Accessories Universal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Steam Distributors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Steam Distributor Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
SAM-e Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Adjustable Mounting Frame for SAM-e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
SAM-e Tube Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
SAM-e Inlet and Adapter Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Remote Blower Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Built-On Blower Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Controls – ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Modulating Control By NORTEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

2008-10-01

Table
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.

2008-10-01

Page
Modulating Demand Signal By Others Single Channel. . . . . . . . . . . . . . . . . . . 113
Modulating Demand Signal By Others Dual Channel . . . . . . . . . . . . . . . . . . . . 113
Modulating By Other Transducer Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
NORTEC OnLine Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
NORTEC Links Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
NH Series Fusing Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

10-00
INTRODUCTION

10-00
Page 1
2008-10-01

Figure 1. NHTC

10-00
Page 2
2008-10-01

1. INTRODUCTION
The NHTC humidifier is controlled by Nortec’s Patented Auto adaptive Water Management
Control System. This system allows the humidifiers to adapt to basically any potable
incoming water and changes that occur to the water supply. This eliminates the need to
readjust drain timers, changes complete cylinders or time consuming adjustment of
electrode spacing’s. The system also adjusts the drain rate of the humidifier to reduce the
amount of drain water exiting the humidifier as water conditions change. This reduces
energy loss due to excessive draining of hot water and extends cylinder life since less water
and minerals enter the humidifier.
The following is a brief description of how the Auto-Adaptive water Management System
works.
The electrode steam system produces pure uncontaminated steam with variable output
through electronic power control of the electrodes. Water borne minerals remain in the
cylinder and are periodically flushed out through the automatic cylinder drain. On NHTC and
NHPC models the drain automatically empties the steam cylinder if it is not operated for
three days. Solid mineral scale sinks to the bottom of the cylinder which, when filled with
residue, is easily removed and replaced.
A. PROPORTIONAL + INTEGRAL AUTO-ADAPTIVE CONTROL SYSTEM FOR THE
NHTC/ NHPC
(1)

NORTEC’s patented P+I Auto-Adaptive control system allows the unit to operate at
an optimal low water level using the same fixed electrode spacing regardless of the
incoming water conditions. Boiling of the water allows the minerals in the water to
remain behind in the cylinder. This raises the contained water conductivity to a
value higher than the incoming water. The P+I Auto-Adaptive control system
monitors and adjusts the contained water conductivity as these changes occur.

(2)

The humidifiers are designed to produce full steam output at the lowest possible
electrode coverage to obtain maximum cylinder life.

(3)

The units operate between A and D of the main steam output demand.
Accordingly, the current flow between the electrodes in the cylinder is maintained
between these pre-established limits programmed into the P+I Auto-Adaptive
control system.

(4)

As the water boils away and the electrode coverage is reduced, the steam output is
also reduced slightly. A pre-determined design parameter of every NORTEC
cylinder is the known time (To) (time optimum) that it takes to boil down from A to
D of output (also referenced to as amp trigger points) at a pre-designed contained
water conductivity. (See Figure 2.)

(5)

Whenever the conductivity in the cylinder water is lower than the designed
conductivity, the (Ta) (time actual) to boil down from A to D will be longer than the
To. (See Figure 3.)

10-00
Page 3
2008-10-01

(6)

As the water is boiled away, the minerals left behind increase the conductivity of
the water in the cylinder. As soon as the conductivity is greater than design, the Ta
to boil from A to D will be shorter than To and a drain cycle is initiated.

(7)

The fill valve always opens during timer drains, adding cold water to mix with the
hot water from the cylinder during automatic drain cycles. This tempering process
is required to meet plumbing codes.

(8)

As can be seen from a typical sequence depicted in Figure 4, the P+I AutoAdaptive system allows the unit to be self-regulating. It drains only when necessary
and only the amount of water to maintain optimum operating conditions.

(9)

Relying on the proportional (P) feedback only to decide how much to drain is like
guessing what is happening based on a ‘snapshot’ only. By taking into
consideration a series of “snapshots”: (one from each of the past ten cycles for
example), the control system has more data on which to base its decision to drain.
The integral (I) part of the P+I Auto-Adaptive system provides this added feedback.

(10) The proportional (P) and integral (I) factors have been weighted as to the relative
influence each will have when the NHTC/NHPC calculates a drain. The
preprogrammed weighing was derived through extensive field and laboratory tests.
When supply water conductivity is extremely high (requiring substantially more
drains), the NHTC/NHPC will see the pattern developing in cycles stored in
memory. It will then initiate additional drains to adjust the contained water
conductivity.
(11) If low conductive water conditions occur, the P+I control will reduce the drains
necessary to maintain optimum operating conditions within the cylinder. If extreme
water conditions are encountered, the NHTC/NHPC can be reprogrammed with
factory instructions to compensate.
(12) NORTEC’s P+I Auto-Adaptive control system has been designed to benefit users
who demand very tight control of the relative humidity. It maintains steam output
above the B level, even during auto drains. (See Figure 4.)
(13) The P+I Auto-Adaptive control system allows the humidifier to maintain tighter
humidity control without the problem of rh depression during drain cycles that occur
with other humidifiers. This results in more consistent space rh levels, even with a
simple on/off control system.

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2008-10-01

Figure 2. Optimum Boiling Time

Figure 3. Conductivity

10-00
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2008-10-01

B. NH CAPACITY ADJUSTMENT
(1)

Each NORTEC NH Series humidifier is rated at its maximum output capacity. By
means of the alphanumeric display and keypad on the NHTC/NHPC, the
humidifiers can be adjusted to obtain an output between 20% and 100% of its rated
capacity.

C. DRAIN CYCLE AND CYLINDER LIFE
(1)

(2)

Water Type Used (Potable or Softened)
(a)

The electrode steam product line is one of the most efficient humidifier
systems since it uses the minerals in the water to conduct electricity. If no
minerals are present no current can pass from one electrode to another, thus
no steam production can occur.

(b)

Although the electrode steam humidifier is ideal for potable water, it should
not be used with pure reverse osmosis or deionized water since the
conductivity is too low.

Water Conditions vs Cylinder Life
(a)

(3)

(4)

The NH Series is designed to adapt to most potable or softened water
supplies. Since the output of all NH Series humidifiers is pure, clean steam,
minerals originally in the incoming water are left behind in the steam cylinder.
Many of these minerals will be removed during short flush cycles within the
cylinder. Therefore, the water chemistry, the unit running time, and output
capacity setting ultimately determines the cylinder life. (See Figure .)

Output vs Cylinder Life
(a)

As minerals build-up on the electrodes in the cylinder of the NORTEC NH
Series humidifier, the patented P+I Auto-Adaptive control system
automatically raises the water level slightly in the cylinder. This exposes fresh
electrode surface to the water and maintains peak output and efficiency from
the humidifier. Once the

(b)

electrode surface is completely encrusted by the minerals, the user is alerted
to change the cylinder. Other humidifiers’ performance degrades gradually as
the minerals build-up. The NH Series maintains maximum efficiency then the
cylinder is replaced. (See Figure .)

Water Conditions vs Drain Rate
(a)

The P+I Auto-Adaptive control system automatically adjusts the drain rate to
maintain the design water conductivity required for proper operation. This
ensures regular flushing of minerals which become concentrated in the water,
and minimizing wastage of hot water. The humidifier automatically adjusts it’s
drain rate with changes in incoming water conductivity through the Autoadaptive water management system.

10-00
Page 6
2008-10-01

0. Store previous cycle’s drain decision in integral (l) memory.
1. Fill to A trigger (use all places below 1-10).
2. Boil to C trigger without timing to allow previous fill water to mix thoroughly during boiling.
3. Boil from C to D while monitoring time (T actual).
4. Decide how long (how much) to drain, then fill to B.
5. Drain according to the P+I calculated drain time, fill on to control outlet temperature.
6. At D, stop draining and postpone remaining drain, fill to B.
7. Continue remaining drain.
8. With drain finished, fill to A.
9. Boil to D, timing from C to D.
10. Decide how long to drain (in this case zero) based on present and past cycles.

Figure 4. Typical Auto-Adaptive Operation

10-00
Page 7
2008-10-01

It is important to note that the drain rate shown includes the make-up water,
mixed with the drain water, which tempers the drain water to 140°F (60°C) or
less.
NOTE
The electrode steam process provides optimum efficiency because all resistance to
current passage is converted to usable energy. Unlike cal-rod or infrared humidifiers
which convert some of their capacities into unusable heat.

Figure 5. Capacity Setting & Cylinder Life

Figure 6. Output vs Service Life

10-00
Page 8
2008-10-01

3. PRE-INSTALLATION EQUIPMENT VERIFICATION
A. GENERAL
(1) Ensure the available voltage and phase correspond with humidifier voltage and
phase as indicated on the humidifier’s specification label.
(2) Ensure that the external fuse disconnect is sufficient size to handle the rated
amperage as indicated on the humidifier’s specifications label. Refer to local building
codes.
(3) Report any discrepancy immediately to the site engineer.
(4) Location and mounting is described in Chapter 10-10.
(5) For typical installation see Figures 6 & 7.

10-00
Page 9
2008-10-01

Figure 6. Typical NHRS Installation (Sheet 1 of 2)

10-00
Page 10
2008-10-01

Figure 7. Typical NHRS Installation (Sheet 2 of 2)

10-00
Page 11
2008-10-01

10-10
HUMIDITY,
STEAM ABSORPTION
AND
DISTRIBUTION

10-10
Page 12
2008-10-01

HUMIDITY, STEAM ABSORPTION AND DISTRIBUTION
1. HUMIDITY
A. ESTIMATING THE HUMIDIFICATION LOAD
Note: The humidification load can easily be calculated by using Nortec’s Humidification Engineering
and Load-sizing Program (HELP). The softward can be downloaded at www.humidity.com

(1) Relative humidity is the percentage of moisture in the volume of air at a given
temperature, compared to the maximum amount of moisture that the volume of air can
hold at the same temperature and atmospheric pressure. As air becomes warmer, it
can absorb more moisture per unit volume. Therefore a quantity of air containing a
specific amount of moisture will have different values of relative humidity as the
temperature changes.
(2) It is this process that causes dry air in building. As cold incoming air is heated, its
relative humidity value drops. Therefore moisture must be added to attain an
acceptable level of humidity within the building. Determining how much moisture must
be added is the object of this brochure. Table 2 simplifies the calculations which are
described here in detail.
B. LOAD CALCULATION SUMMARY
(1) In order to determine the humidification load three basic values need to be known:
(a) The design conditions of the humidified space, i.e., the temperature and humidity
required.
(b) The conditions of the incoming air, i.e., the temperature and humidity available.
(c) Incoming air volume and secondary conditions that can affect the humidification
load.
(2) Data and calculations required to estimate humidification load are described in
Tables 1, 2 and 3.
C. TEMPERATURE AND HUMIDITY REQUIRED
(1) The design temperature and humidity of a space depends mostly upon the job being
performed. Once the design temperature and humidity have been established, the
required moisture can be found in gr/ft3 from Table 3. Remember always to take the
worst case (highest temperature, highest humidity).
(2) Formula 1
For example:
The press room of a printing plant should be kept at 76 - 80°F with 43% - 47% rh
Therefore, the worst case is 80°F, 47% rh.
From Table 3 the required moisture is 11.04 gr/ft3 x 47% = 5.19 gr/ft3
D. TEMPERATURE AND HUMIDITY AVAILABLE
(1) The outdoor conditions tell us the moisture available in the incoming air. Approximate
values can be obtained from Table 4 and combined with Table 3 to find moisture
available. Once again we must take the worst case (here, it is lowest temperature,
lowest humidity). As can be seen, the contribution of moisture from the outside air is
almost zero.

10-10
Page 13
2008-10-01

Outdoor relative humidity

Table 1. Outdoor/Indoor Relative Humidity Conversion Chart
100%

2

4

5

6

7

9

12

17

19

23

29

36

43

52

95%

2

3

4

6

7

9

12

16

17

22

28

34

41

50

90%

2

3

4

5

6

8

11

15

16

21

26

31

39

48

85%

2

3

4

5

6

8

11

14

15

20

24

29

37

45

80%

2

3

4

5

6

7

10

13

15

19

23

27

35

42

75%

2

3

4

4

5

7

10

12

14

18

22

26

33

39

70%

1

2

3

4

5

6

9

11

13

17

20

24

31

36

65%

1

2

3

4

4

5

8

10

12

15

19

23

29

34

60%

1

2

3

3

4

5

7

9

11

14

17

21

26

31

55%

1

1

3

3

4

4

7

8

10

13

16

19

24

29

50%

1

1

2

3

3

4

6

8

9

12

14

18

22

26

45%

1

1

2

3

3

4

6

7

8

11

13

16

20

24

40%

1

1

2

2

3

4

5

7

7

10

12

14

18

21

35%

1

1

2

2

2

4

5

6

6

9

10

12

15

18

30%

0

1

2

2

2

3

4

5

6

7

9

11

13

15

25%

0

1

1

1

2

3

3

4

5

5

7

9

11

13

20%

0

1

1

1

2

2

3

3

4

5

5

7

9

10

15%

0

0

1

1

1

1

2

3

3

4

4

5

6

8

10%

0

0

0

1

1

1

2

2

2

3

3

3

4

6

5%

0

0

0

0

0

0

1

1

1

2

2

2

3

3

0%

0

0

0

0

0

0

0

0

0

0

0

0

0

0

-20°

-10°

-5°

0°

+5°

+10°

+15°

+20°

+25°

+30°

+35°

+40°

+45°

+50°

Outdoor temperature
Chart shows what the residual indoor RH would be at 70°F under varying outdoor conditions if a proper humidification
system were not installed in the building. Studies indicate that the recommended RH should be between 40% and 60%
for optimum benefits to the occupants.

Table 2. Load Calculation Summary Sheet
Determine the moisture required in the space (Table 3)
Grains from Table 3 at space temp. ______ x Indoor RH

= A ______ gr/ft3

Determine the moisture level of incoming air (Table 4)
Grains from Table 4 at space temp. ______ x Outdoor RH

= B ______ gr/ft3

→M ______ gr/ft3

Therefore: moisture to be added: (moisture) M - A - B ______ gr/ft3
Determine the volume of air to be humidified. Choose the largest
value.
1. Natural ventilation: Volume x number of air changes.

______ ft3/hr

2. Exhaust air: CFM x 60 min/hr

______ ft3/hr

3. Make-up air: CFM x 60 min/hr

______ ft3/hr

Therefore: Gross humidification load = L (load) = MxC = ______ lbs/hr
7,000
NOTES: 1. 7,000 grains = 1 pound
2. If HVAC system uses economizer cycle, check load using formula 6.

10-10
Page 14
2008-10-01

→C ______ ft3/hr
→L ______ lbs/hr

Table 3. Grains of Water Per Cubic Foot – Saturated Air (100% rh)
°C

°F

Grains

°C

°F

Grains

-23

-10

.29

4

40

2.86

-5

.35

41

2.97

0

.48

42

3.08

8

.61

43

10

.78

-18

-12

°F

Grains

58

5.41

°C

°F

Grains

°C

°F

Grains

76

9.75

35

95

17.28

59

5.60

77

10.06

96

17.80

60

5.80

78

10.40

97

18.31

3.20

61

6.00

79

10.80

98

18.85

44

3.32

62

6.20

80

11.04

99

19.39

16

27

-9

15

.99

45

3.44

63

6.41

81

11.40

100

19.95

-7

20

1.24

46

3.56

64

6.62

82

11.75

101

20.52

-4

25

1.56

47

3.69

65

6.85

83

12.11

102

21.11

-1

30

1.95

48

3.83

66

7.07

84

12.49

103

21.71

31

2.04

49

3.97

67

7.31

85

12.87

104

22.32

32

2.13

50

4.11

68

7.57

86

13.27

105

22.95

33

2.21

51

4.26

34

2.29

52

4.41

35

2.38

53

4.56

36

2.47

37

2.56

38
39

2

7

°C

10

18

21

29

69

7.80

87

13.67

106

23.60

8.10

88

14.08

107

24.26

71

8.32

89

14.51

108

24.93

54

4.72

72

8.59

90

14.94

4.89

73

8.87

91

15.39

2.66

56

5.06

74

9.15

92

2.76

57

5.23

75

9.45

24

41

70

55

13

38

32

109

25.62

110

26.34

15.84

111

27.07

93

16.31

112

27.81

94

16.79

113

28.57

43

°C

49

54

60

66

71

°F

Grains

114

29.34

115

30.13

120

34.38

125

39.13

130

44.41

135

50.30

140

56.81

145

64.04

150

72.00

155

80.77

160

90.43

165 101.00
77

170 112.60
175 125.40

82

180 139.20
185 154.30

88

190 170.70
195 188.60

(2) Formula 2
Assume our printing plant is located in Denver, Colorado. From Table 4, the worst
case is -10°F with 37% rh
From Table 3:
0.29 gr/ft3 x 37% rh - 0.11 gr/ft3
Combining this result with that of Moisture Required (A) we see that we will need
5.19 - 0.11 = 5.08 grains of moisture for every cubic foot of outside air brought in.
E.

INCOMING AIR VOLUME
(1) The following outlines the steps necessary to determine the amount of outside air being
brought into the humidified space and the corresponding amount of moisture required.
There are three basic means by which outside air is introduced into the humidified
space. These are:
(a) Through natural ventilation, for example, opening and closing doors and windows,
and by infiltration through cracks and openings in the building construction.
(b) Through mechanical ventilation, for example, the introduction of make-up air, or
the exhausting of stale air by the building HVAC system.
(c) Through the economizer section of the HVAC system - if this feature is included in
the system.
(2) For maximum accuracy, all three should be estimated and the largest chosen.

10-10
Page 15
2008-10-01

Table 4. Design Outdoor Conditions
JANUARY
Relative Humidity
(% RH)
State
Alabama
Arizona

Arkansas
California

Colorado

Connecticut
Delaware
District of
Columbia
Florida
Georgia

Idaho
Illinois

Indiana

Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire

10-10
Page 16
2008-10-01

81
-83
75
56
80

61
-58
47
37
67

66
--39
27
68

Dry
Bulb
°F
95
95
90
105
110
95

30
25
35
30
35
35
-10
-15
-20
0
0
0

87
93
63
90
76
84
54
77
67
75
77
73

-80
46
82
58
68
37
64
44
65
62
56

77
66
51
70
60
70
41
64
48
69
70
64

-4
2
-12
-12
-7
-23
-20
-18
-23
-23
-23
-23
-18
-26
-29
-23
-23
-18
-7
-7
-21
-18

25
35
10
10
20
-10
-5
0
-10
-10
-10
-10
0
-15
-20
-10
-10
0
20
20
-5
0

89
87
80
84
83
82
79
81
81
83
84
83
82
-78
78
78
78
85
83
81
72

56
59
64
59
58
75
73
69
70
72
75
72
70
-67
57
64
68
67
67
65
68

-18
-23
-23
-32
-29
-12
-23
-18
-32
-29
-29
-23
-21
-26

0
-10
-10
-25
-20
10
-10
0
-25
-20
-20
-10
-5
-15

72
82
85
78
82
82
78
77
67
76
80
82
82
78

59
71
78
74
72
65
64
65
73
70
62
68
67
60

Birmingham
Mobile
Flagstaff
Phoenix
Yuma
Little Rock

-12
-12
-23
-4
-1
-15

Dry
Bulb
°F
10
10
-10
25
30
5

Eureka
Fresno
Los Angeles
Sacramento
San Diego
San Francisco
Denver
Grand Junction
Pueblo
New Haven
Wilmington
Washington

-1
-4
2
-1
2
2
-23
-26
-29
-18
-18
-18

Jacksonville
Miami
Atlanta
Augusta
Savannah
Boise
Lewiston
Cairo
Chicago
Peoria
Fort Wayne
Indianapolis
Terre Haute
Davenport
Sioux City
Dodge City
Topeka
Louisville
New Orleans
Shreveport
Portland
Baltimore
Boston
Detroit
Grand Rapids
Duluth
Minneapolis
Vicksburg
Kansas City
St. Louis
Billings
Butte
North Platte
Omaha
Reno
Concord

City

JULY
Relative Humidity
(% RH)

°C

7:30
A.M.

1:30
P.M.

7:30
P.M.

7:30
A.M.

1:30
P.M.

7:30
P.M.

°C

84
90
77
53
51
85

56
64
36
31
31
55

68
78
-23
23
59

35
35
32
41
44
35

90
105
90
100
85
85
95
95
95
95
95
95

92
61
85
76
86
92
55
48
73
77
80
78

-36
50
46
68
75
27
27
34
64
52
52

80
20
54
28
65
78
30
22
35
74
69
64

32
41
32
38
29
29
35
35
35
35
35
35

75
75
69
69
72
74
71
-75
77
81
78
76
-72
61
67
69
73
66
74
56

95
91
95
98
95
95
95
98
95
96
95
95
95
95
95
95
100
95
95
100
90
95

85
83
83
83
85
54
64
83
78
81
84
84
77
-86
77
85
77
84
86
78
71

57
64
57
55
61
34
37
57
51
53
53
54
50
-55
45
54
52
64
56
58
52

76
76
68
69
80
23
25
-55
58
58
60
56
-54
52
54
57
72
62
76
65

35
33
35
37
35
35
35
37
35
35
35
35
35
35
35
35
38
35
35
38
32
35

67
77
80
74
75
67
66
68
60
71
66
73
54
69

92
95
95
93
95
95
100
95
90
95
85
95
95
90

72
74
76
87
82
87
76
73
65
82
84
80
72
80

55
50
51
61
54
61
48
50
40
36
50
51
25
49

70
56
54
66
54
70
47
55
33
33
46
51
20
69

33
35
35
33
35
35
38
35
32
35
29
35
35
32

Table 4. Design Outdoor Conditions (cont)
JANUARY
Relative Humidity
(% RH)
State
New Jersey

New Mexico
New York

North Carolina
North Dakota
Ohio

Oklahoma
Oregon
Pennsylvania

Rhode Island
South Carolina
South Dakota
Tennessee
Texas

Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Province
Alberta

British Columbia

City
Atlantic City
Newark
Trenton
Albuquerque
Albany
Buffalo
New York
Rochester
Asheville
Raleigh
Bismarck
Cincinnati
Cleveland
Columbus
Toledo
Oklahoma City
Baker
Portland
Harrisburg
Philadelphia
Pittsburgh
Scranton
Providence
Charleston
Columbia
Huron
Rapid City
Knoxville
Memphis
Amarillo
Corpus Christi
Dallas
El Paso
Houston
San Antonio
Salt Lake City
Burlington
Richmond
Seattle
Walla Walla
Charleston
Parkersburg
Green Bay
Milwaukee
Cheyenne
City
Calgary
Edmonton
Grande Prairie
Lethbridge
Medicine Hat
Estevan Point
Fort Nelson
Penticton
Prince George
Prince Rupert
Vancouver

-15
-18
-18
-18
-23
-21
-18
-21
-18
-12
-34
-18
-18
-23
-23
-18
-21
12
-18
-18
-18
-21
-18
-9
-12
-29
-29
-18
-18
-23
-7
-12
-12
-7
-7
-23
-23
-9
-9
-21
-18
-23
-26
-26
-26

Dry
Bulb
°F
5
0
0
0
-10
-5
0
-5
0
10
-30
0
0
-10
-10
0
-5
10
0
0
0
-5
0
15
10
-20
-20
0
0
-10
20
10
10
20
20
-10
-10
15
15
-5
0
-10
-15
-15
-15

-34
-34
-42
-36
-34
-8
-40
-18
-38
-12
-9

-29
-29
-43
-32
-30
17
-40
0
-37
11
15

°C

7:30
A.M.
79
72
73
68
75
79
72
81
82
82
77
82
81
83
79
79
83
87
72
74
77
80
73
87
81
79
71
83
82
71
88
81
63
85
82
80
81
84
86
80
79
82
75
76
59

1:30
P.M.
68
79
62
51
63
72
61
73
59
57
71
70
72
71
72
62
81
82
49
65
67
67
60
55
57
72
69
65
67
51
66
62
45
66
60
71
69
60
80
74
64
66
68
70
48
71
75
80
66
73
84
79
81
82
87
87

JULY
Relative Humidity
(% RH)

7:30
P.M.
74
65
68
46
71
78
66
79
69
69
75
74
79
76
75
65
78
78
65
68
63
-67
76
65
76
67
69
73
52
75
62
39
73
59
72
78
68
74
78
70
74
73
73
55

Dry
Bulb
°F
95
95
95
95
93
93
95
95
93
95
95
95
95
95
95
101
90
90
95
95
95
95
93
95
95
95
95
95
95
100
95
100
100
95
100
95
90
95
85
95
95
95
95
95
95
87
86
84
91
96
87
94
85
73
80
80

7:30
A.M.
81
75
77
59
79
78
75
80
88
86
85
84
79
78
76
80
69
86
78
78
80
77
79
88
83
86
71
83
85
77
93
79
60
90
88
56
76
81
86
50
88
80
85
81
73

1:30
P.M.
72
51
55
33
52
53
58
50
56
55
52
52
52
52
52
49
68
63
51
52
52
50
57
64
56
52
42
55
55
43
58
50
37
58
49
27
54
57
63
33
53
52
58
58
36
34
42
38
30
31
32
32
44
53
54
41

7:30
P.M.
82
65
68
28
64
63
68
60
73
72
49
60
58
60
59
51
36
48
62
64
63
-73
82
68
49
40
66
59
42
68
47
30
66
45
23
67
72
47
22
67
65
64
64
40

°C
35
35
35
35
34
34
35
35
34
35
35
35
35
35
35
38
32
32
35
35
35
35
34
35
35
35
35
35
35
38
35
38
38
35
38
35
32
35
29
35
35
35
35
35
35
31
30
29
33
36
31
34
29
23
27
27

10-10
Page 17
2008-10-01

Table 4. Design Outdoor Conditions (cont)
JANUARY
Relative Humidity
(% RH)
Province
Manitoba

New Brunswick

Newfoundland

N.W.T.

Nova Scotia

Ontario

P.E.I.
Quebec

Saskatchewan

Yukon Territory

10-10
Page 18
2008-10-01

City
Brandon
Churchill
The Pas
Winnipeg
Campbellton
Fredericton
Moncton
Saint John
Corner Brook
Gander
Goose Bay
St. John’s
Frobisher
Resolute
Yellowknife
Halifax
Sydney
Yarmouth
Thunder Bay
Hamilton
Kaspuskasing
Kingston
Kitchener
London
North Bay
Ottawa
Peterborough
Sioux Lookout
Sudbury
Timmins
Toronto
Windsor
Sault St. Marie
Charlottetown
Knob Lake
Mont Joli
Montreal
Port Harrison
Quebec City
Sept-Iles
Sherbrooke
Trois Rivieres
Prince Albert
Regina
Saskatoon
Swift Current
Dawson
Whitehorse

°C
-34
-40
-37
-34
-28
-27
-24
-24
-23
-21
-32
-17
-43
-45
-45
-18
-17
-15
-33
-18
-34
-24
-19
-18
-29
-27
-25
-36
-29
-36
-19
-16
-29
-21
-40
-24
-27
-39
-28
-33
-28
-28
-41
-37
-37
-34
-49
-43

Dry
Bulb
°F
-29
-40
-35
-29
-18
-16
-12
-12
-10
-5
-26
1
-45
-49
-49
0
1
5
-27
0
-30
-11
-3
0
-20
-17
-13
-33
-20
-33
-3
-3
-20
-6
-40
-11
-16
-39
-19
-27
-18
-18
-41
-34
-34
-29
-56
-45

7:30
A.M.

1:30
P.M.
73
76
77
78
77
72
82
82
84
76
85
77
71
82
83
84
83
80
75
79
84
80
77
77
78
81
79
82

86
79
75
76
81

77
81
76
79
76
80

7:30
P.M.

JULY
Relative Humidity
(% RH)
Dry
Bulb
°F
90
79
85
90
87
89
88
81
84
85
86
79
63
54
78
83
84
76
86
91
87
85
88
90
87
90
90
65
89
90
90
92
88
84
55
62
88
86
80
87
88
88
92
90
93
57
78

7:30
A.M.

1:30
P.M.

7:30
P.M.

°C

50
57
54
50
54
47
52
62
47
45
42
60
67
81
50
50
56
70
52
52
52
69
58
53
46
50
53
69
44
45
56
51
48
57
70
71
58

32
26
29
32
31
32
31
27
29
29
30
26
17
12
26
28
29
24
30
33
31
29
31
32
31
32
32
18
32
32
32
31
29
29
13
17
31

60
47
58
58

30
27
31
31
31
33
32
34
14
26

60
40

(3) Using the natural ventilation method requires knowing the volume of the humidified
space and the type of construction. A tightly constructed building will have a least one
air change per hour. A loosely constructed building will have at least one and one half
changes per hour, and this same building with a large a amount of incoming or exiting
traffic will have at least two air changes per hour.
(a) Formula 3
Assume our print shop has a floor area of 100' x 100' with a 20' ceiling with a
large amount of traffic. This requires
100' x 100' x 20' x 2 = 400,000 ft3/hr.
Using our example, the moisture required is
400,000
x 5.08
_______________
= 290 lbs/hr
7000 grains/lb
(4) Using make-up air:
(a) Formula 4
Assume our print shop has a 15,000 CFM HVAC system and uses 10%
make-up air during winter. The amount of outside make-up air entering the
HVAC system will, therefore, be 10% of 15,000 CFM = 1,500 CFM. The
moisture required will be
1,500
x 5.08 x 60 min/hr
_________________________
= 65 lbs/hr
7,000 grains/lb
(Refer to Figure 1.)

Figure 1. Schematic of a Typical Print Shop HVAC System

10-10
Page 19
2008-10-01

(5) Using an exhaust air fan:
(a) Formula 5
Assume the print shop has a 1,000 CFM fan to exhaust a drying room. The
moisture required to humidify the drying room only is
1,000
x 5.08 x 60 min/hr
_________________________
= 44 lbs/hr
7,000 grains/lb
(Refer to Figure 1.)
(6) Using an economizer cycle:
(a) Care should be taken in sizing humidification load when an economizer cycle is
incorporated into a building HVAC system. The purpose of an economizer cycle is
to provide building cooling using outside air, rather then the building refrigeration
system when outside air conditions permit.
(b) The economizer cycle senses and compares outdoor air temperature and return
air temperature during the cooling season.
(c) When the HVAC system calls for cooling and the outdoor air temperature is low
enough – typically 55°F or lower – the outside air and exhaust air dampers are
positioned to provide the required supply air temperature to maintain cooling, and
the recirculated air damper is positioned to maintain the required supply air
volume. When the outdoor air temperature is higher than the supply air
temperature required to maintain cooling but is lower than the return air
temperature, the make-up air and exhaust air dampers are 100% open. The
recirculation air damper closes, and the building refrigeration system provides the
portion of cooling load that cannot be provided by outside air intake.
(d) From this it can be seen that it is possible to introduce 100% outside air into a
building during the cooling season.
(e) Formula 6
For example, if out print shop were using 100% outdoor air at 55°F and
40% rh, then the moisture required is
5.19 - (4.89 x 40% rh) = 3.23 gr/ft3
Therefore, on a 15,000 CFM system, the humidification load will be
15,000
x 3.23 x 60 min/hr
__________________________
= 415 lbs/hr
7,000 grains/lb
(f)

In the above examples, the largest humidification load was due to the economizer
cycle at 415 lbs/hr.

(7) Using cooling or refrigeration loads:
(a) As air is cooled, it loses it’s ability to hold moisture. If it is cooled enough, some of
the moisture will condense out. This is known as cooling load. Cooling load
calculations can be important for process applications or refrigeration applications
to product dehydration.

10-10
Page 20
2008-10-01

(b) Formula 7
Assume that during the summer the HVAC system is in the cooling mode. The
air leaving the cooling coil is at 55°F and 90% rh. In order to maintain the
desired 47% rh in the space, moisture must be added using the following
formula:
Desired space 80°F 47% rh = 5.19 gr/ft3
(Formula 1)
55°F
90% = 4.89 x 0.90
________________________
Grains to add

= __________
4.40 gr/ft3
= 0.79 gr/ft3

15,000
x 0.79 x 60 min/hr
_________________________
7,000 grains/lb

= 101.57 lbs/hr

(8) In considering Process and Environment, in Tables 5 through 7 you will find conditions
and processes that may affect your calculation and should be addressed.
(a) Table 5 shows the outdoor temperature at which the rh would cause condensation
on the windows to the outside. Should your outdoor conditions make this a
possibility, an outdoor setback sensor may be a solution.
(b) Table 6 describes the moisture gain of various material and if your process or
environment includes a great amount of these materials that are constantly
introduced to the area, its affects must be considered.
(c) Table 7 identifies many recommended indoor conditions for various locations and
processes, these can be of use when deciding what conditions would be most
beneficial in your application.
(d) In Figure 2, you will find the ASHRAE physchrometric chart describing the
enthalpy of dry air and the effects to and from rh in the air.

Table 5. Inside Relative Humidities At Which Moisture Will Condense On Windows
Outside
Temperature
°F

°C

Outside
Temperature

Inside Temperature (°F/°C)
60/
15.5

65/
18.3

70/
21

75/
23.8

80/
26.6

Single Windows, Still Air

°F

°C

Inside Temperature (°F/°C)
60/
15.5

65/
18.3

70/
21

75/
23.8

80/
26.6

Single Windows, Wind

-50

-45

9

9

9

8

8

-50

-45

4

3

3

3

2

-40

-40

12

12

11

10

10

-40

-40

5

4

4

4

3

-30

-34

16

14

14

13

13

-30

-34

7

6

6

6

5

-20

-29

20

18

18

17

16

-20

-29

10

9

9

8

7

-10

-23

25

23

22

21

20

-10

-23

14

13

12

11

10

0

-18

32

29

27

25

24

0

-18

20

18

16

15

13

10

-12

39

36

33

31

29

10

-12

28

24

22

20

18

20

-7

47

43

40

37

35

20

-7

36

32

30

26

24

30

-1

57

52

50

45

42

30

-1

48

41

38

34

30

40

4

70

63

60

53

50

40

4

62

54

49

43

40

NOTE: Bold areas indicate that moisture will be in the form of frost on windows.

10-10
Page 21
2008-10-01

Table 5. Inside Relative Humidities At Which Moisture Will Condense On Windows (cont)
Outside
Temperature
°F

°C

Outside
Temperature

Inside Temperature (°F/°C)
60/
15.5

65/
18.3

70/
21

75/
23.8

80/
26.6

°F

Double Windows, Still Air

°C

Inside Temperature (°F/°C)
60/
15.5

65/
18.3

70/
21

75/
23.8

80/
26.6

Double Windows, Wind

-50

-45

34

34

34

33

32

-50

-45

23

26

26

26

25

-40

-40

38

38

36

36

35

-40

-40

32

30

30

29

28

-30

-34

42

42

41

40

38

-30

-34

36

34

34

32

31

-20

-29

47

46

46

44

42

-20

-29

41

39

38

35

35

-10

-23

52

50

49

48

46

-10

-23

46

45

42

42

39

0

-18

57

55

55

52

50

0

-18

52

49

47

46

44

10

-12

62

60

59

57

54

10

-12

58

56

53

52

49

20

-7

69

66

63

62

59

20

-7

65

63

59

58

54

30

-1

76

73

71

68

65

30

-1

72

70

66

64

60

40

4

84

80

79

74

71

40

4

80

78

73

70

67

NOTE: Bold areas indicate that moisture will be in the form of frost on windows.

Table 6. Regain of Hygroscopic Materials
Industry

Materials

Relative Humidity - %
70

80

90

Crackers
Flour
White Bread

2.1
2.6
0.5

2.8
4.1
1.7

3.3
5.3
3.1

3.9
6.5
4.5

5.0
8.0
6.2

6.5
9.9
8.5

8.3
12.4
11.1

10.9
15.4
14.5

14.9
19.1
19.0

Leather

Sole Oak, Tanned

5.0

8.5

11.2

13.6

16.0

18.3

20.6

24.0

29.2

Printing

Paper – Comm. Ledger – 75% Rag
1% Ash
Paper M.F. Newsprint – 24% Ash
Paper White Bond Rag – 1% Ash
Paper Writing – 3% Ash

3.2

4.2

5.0

5.6

6.2

6.9

8.1

10.3

13.9

2.1
2.4
3.0

3.2
3.7
4.2

4.0
4.7
5.2

4.7
5.5
6.2

6.1
6.5
7.2

7.2
7.5
8.3

8.7
8.8
9.9

10.6
10.8
11.9

13.2
14.2

Cotton – Absorbent
Cotton – American-cloth
Cotton – Sea Isle-roving
Hemp – Manila and Sisal
Jute – Average Grade
Linen – Dried Spun – Yarn
Rayon – Celulose – Acetate – Fibre
Rayon – Cupramonium – Average
Skein
Rayon – Viscose Nitrocel
Silk – Raw Chevennes-Skein
Wool – Australian-Marino-Skein

4.8
2.6
2.5
2.7
3.1
3.6
0.8
4.0

9.0
3.7
3.7
4.7
5.2
5.4
1.1
5.7

12.5
4.4
4.6
6.0
6.9
6.5
1.4
6.8

15.7
5.2
5.6
7.2
8.5
7.3
1.9
7.9

18.5
5.9
6.6
8.5
10.2
8.1
2.4
9.2

20.8
6.8
7.9
9.9
12.2
8.9
3.0
10.8

22.8
8.1
9.5
11.6
14.4
9.8
3.6
12.4

24.3
10.0
11.5
13.6
17.1
11.2
4.3
14.2

25.8
14.3
14.1
15.7
20.2
13.8
5.3
10.0

4.0
3.2
4.7

5.7
5.5
7.0

6.8
6.9
8.9

7.9
8.0
10.8

9.2
8.9
12.8

10.8
10.2
14.9

12.4
11.9
17.2

14.2
14.3
19.9

16.0
18.8
23.4

Tobacco

Cigarette

5.4

8.6

11.0

13.3

16.0

19.5

25.0

33.5

50.0

Wood

Timber – Average
Glue – Hide

3.0
3.4

4.4
4.8

5.9
5.8

7.6
6.6

9.3
7.6

11.3
9.0

14.0
10.7

17.5
11.8

22.0
12.5

7.1
0.7
5.7
1.9
2.2

14.3
1.6
9.8
3.8
3.8

22.8
2.8
12.7
5.7
5.2

26.2
3.8
15.2
7.6
6.4

28.3
4.9
17.2
10.0
7.4

29.2
6.1
18.6
12.9
8.3

30.0
7.6
20.2
16.1
9.2

31.1
9.3
21.5
19.8
10.6

32.7
11.4
22.6
23.8
12.7

Baking

Textile

Miscellaneous Charcoal-Steam Activated
Gelatin
Silica Gel
Soap
Starch

10

20

30

40

50

60

NOTE: Moisture content expressed in per cent of dry weight of the substance at various relative humidities –
Temperature 75°F.

10-10
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Table 7. Design Indoor Conditions For Various Places, Products and Processes
Product and/or Process
Abrasives Manufacturing
Bowling Alleys
Billiard Rooms
Bread
Flour and Powdered Product Storage
Fermentation (Bread Dough)
Retarding of Doughs
Final Proof
Counterflow Cooling
Brewing
Hop Storage
Yeast Culture Room
Candy
Chocolate Pan Supply Air
Enrober Room
Chocolate Cooling Tunnel Supply Air
Hand Dippers
Moulded Goods Cooling
Chocolate Packing Room and Finished Stock Storage
Centers Tempering Room
Marshmallow Setting Room
Grained Marshmallow (deposited in starch) Drying
Gum (deposited in starch) Drying
Sanded Gum Drying
Gum Finished Stock Storage
Sugar Pan Supply Air (engrossing)
Polishing Pan Supply Air
Pan Rooms
Nonpareil Pan Supply Air
Hard Candy Cooling Tunnel Supply Air
Hard Candy Packing
Hand Candy Storage
Caramel Rooms
Raw Material Storage
Nuts (insect)
Nuts (rancidity)
Eggs
Chocolate (flats)
Butter
Dates, Figs, etc.
Corn Syrup
Liquid Sugar
Comfort Air Conditioners
Ceramics
Refractory
Molding Room
Clay Storage
Decalcomania Production and Decorating room
Cereal Packaging
Cheese Curing
Cheddar
Swiss
Blue
Brick
Limburger
Camembert

Relative
Humidity
%RH

Temperature
°F
78
73 – 75
73 – 75

°C
25
23 – 24
23 – 24

50
50 – 55
40 – 50

70 – 80
80
32 – 40
95 – 120
75

21 – 27
27
0–4
35 – 49
24

60
75
85
85 – 90
80 – 85

29 – 32
--

2–0
--

50 – 60
80

55 – 62
80 – 85
40 – 45
62
40 – 45
65
75 – 80
75 – 78
110
125 – 150
100
50 – 65
85 – 105
70 – 80
75 – 80
100 – 120
60 – 70
70 – 75
50 – 70
70 – 80

13 – 17
27 – 29
4–7
17
4–7
18
24 – 27
24 – 26
43
52 – 66
38
10 – 18
29 – 41
21 – 27
24 – 27
38 – 49
16 – 21
21 – 24
10 – 21
21 – 27

45 – 55
25 – 30
70 – 85
45
70 – 85
50
30 – 35
40 – 45
40
15 – 25
25 – 40
65
20 – 30
40 – 50
30 – 35
20
40 – 55
35 – 40
40
40

45
34 – 38
30
65
20
40 – 45
90 – 100
75 – 80
75 – 80

7
1–3
-1
18
-7
4–7
32 – 38
24 – 27
24 – 27

65 – 75
65 – 75
85 – 90
50
65 – 75
–
30 – 40
50 – 60

110 – 150
80
60 – 80
75 – 80
75 – 80

43 – 66
27
16 – 27
24 – 27
24 – 27

50 – 90
60 – 70
35 – 65
48
45 – 50

45 – 55
60
48 – 50
60 – 65
60 – 65
53 – 59

7 – 13
16
9 – 10
16 – 18
16 – 18
12 – 15

85 – 90
80 – 85
95
90
95
90

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Table 7. Design Indoor Conditions For Various Places, Products and Processes (cont)
Relative
Humidity
%RH

Temperature

Product and/or Process
°F

°C

70 – 80
70 – 74
71.5 – 72.5

21 – 27
21 – 23
22 – 22.5

40 – 60
40 – 60
43 – 47

60
0 – 75
65 – 72

16
16 – 24
18 – 22

35 – 40
45 – 60
50 – 60

72
68
70
76
72
76
73
75
68
76

22
20
21
24
22
24
23
24
20
24

15
40
50 – 55
50 – 55
40 – 45
60 – 63
50
65 – 70
20 – 40
30 – 60

70
74

21
23

30 – 50
30 – 40

Fruit Storage
Apples
Apricots
Grapefruits (California)
Grapefruits (Florida)
Grapes (Eastern)
Grapes (Western)
Lemons
Oranges (California)
Oranges (Florida)
Peaches and Nectarines
Plums
Specialty Citrus Fruit

30 – 40
31 – 32
58 – 60
50
31 – 32
30 – 31
58 – 60
40 – 44
32 – 34
31
30 – 32
38 – 40

-1– 4
-1 – 0
14 – 16
10
-1 – 0
-1
14 – 16
4–7
0–1
-1
-1 – 0
3–4

90
90 – 95
85 – 90
85 – 90
85
90 – 95
86 – 88
85 – 90
85 – 90
90
90 – 95
90 – 95

Fur Storage

40 – 50

4 – 10

55 – 65

Gum
Manufacture
Rolling
Stripping
Breaking
Wrapping

77
68
72
74
74

25
20
22
23
23

33
63
53
47
58

Hospitals
Operating, Cystoscopic and Fracture Rooms
Patient Rooms
Intensive Care Unit
Administrative and Service Areas

68 – 76
75
75
70 – 80

20 – 24
24
24
21 – 27

50
40 – 50
40
30 – 50

Leather
Drying
Storage, Winter Room Temperature

70 – 120
50 – 60

21 – 49
10 – 16

75
40 – 60

75
80

27
27

45
80

Clean Rooms – Computer Rooms
Computer Room
Clean Room – General
Clean Room – Critical
Distilling
Grain Storage
General Manufacturing
Aging
Electrical Products
Coil and Transformer Winding
X-ray Tube Assembly
Instruments Manufacture and Laboratory
Thermostat and Humidistat Assembly and Calibration
Close Tolerance Assembly
Meter Assembly and Test
Fuse and Cutout Assembly, Capacitor Winding and Paper Storage
Conductor Wrapping with Yarn
Lightning Arrestor Assembly
Thermal Circuit Breaker Assembly and Test Water Wheel Generators
Thrust
Runner Hopping
Processing Selenium and Copper Oxide Plates

Lenses (Optical)
Fusing
Grinding

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Table 7. Design Indoor Conditions For Various Places, Products and Processes (cont)
Relative
Humidity
%RH

Temperature

Product and/or Process
°F

°C

Libraries and Museums
Normal Reading and Viewing Rooms
Rare Manuscript Storage Vaults
Art Storage Areas

70 – 74
70 – 72
65 – 72

21 – 23
21 – 22
17 – 22

40 – 50
45
50

Matches
Manufacture
Drying
Storage

72 – 74
70 – 75
60 – 62

22 – 23
21 – 24
16 – 17

50
60
50

Meat and Fish
Beef (Fresh)
Beef, Fish, Lamb and Pork (Frozen)
Fish (Fresh)
Lamb and Pork (Fresh)

32 –34
-10 – 0
33 – 35
32 – 34

0–1
-23 – -18
1–3
0–1

88 – 92
90 – 95
90 – 95
85 – 90

120 – 140
60 – 75
48 – 60
32 – 35

49 – 60
16 – 24
9 – 16
0–2

–
Nearly Sat.
80
80 – 85

Oil Paints: Paint Spraying

60 – 90

16 – 32

80

Pharmaceuticals
Manufactured Powder Storage and Packaging Area
Milling Room, Table Compressing and Coating
Effervescent Tablets and Powders
Hypodermic Tablets
Colloids
Cough Drops
Glandular Products
Ampoule Manufacturing
Gelatin Capsules and Storage
Microanalysis
Biological Manufacturing and Liver Extracts
Serums
Animal Rooms

75
75
75
75
70
80
76
75
76
76
76
76
75 – 80

24
24
24
24
21
27
24
24
24
24
24
24
24 – 27

35
35
20
30
30 – 50
40
5 – 10
35 – 50
35
50
35
50
50

80
75 – 80

27
24 – 27

35 – 30
45 – 65

90
90

32
32

60
15 – 25

Printing
Platemaking
Lithographic Press Room
Letterpress and Web Offset Press Rooms and Paper Storage
Paper Storage (Multicolor Sheet Feed Lithography)

75 – 80
76 – 80
76 – 80
76 – 80

24 – 27
24 – 27
24 – 27
24 – 27

45 Max
43 – 47
50
5–8
Higher than
Press Room

Rubber Dipped Goods
Cementing
Dipping Surgical Articles
Storage Prior to Manufacture
Laboratory (ASTM Standard)

80
75 – 90
60 – 75
73.4

27
24 – 32
16 – 24
23

25 – 30
25 – 30
40 – 50
50

65

18

65

Mushrooms
Sweating-out Period
Spawn Added
Growing Period
Storage

Plastics
Manufacturing Areas Thermosetting
Molding Compounds
Cellophane Wrapping
Plywood
Hot Pressing (Resin)
Cold Pressing

Tea Packaging

10-10
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Table 7. Design Indoor Conditions For Various Places, Products and Processes (cont)
Product and/or Process

Textiles
Opening and Picking
Cotton
Man-Made
Carding
Cotton
Wool
Man-Made
Silver and Ribbon Lapping
Cotton
Man-Made
Combing
Cotton
Wool
Man-Made
Drawing
Cotton and Wool
Man-Made
Roving
Cotton
Man-Made
Spinning
Cotton
Wool
Man-Made
Winding and Spooling
Cotton
Wool
Man-Made
Twisting
Cotton
Man-Made
Warping
Cotton
Wool
Man-Made
Knitting
Cotton
Man-Made
Weaving
Cotton
Wool
Man-Made
Tobacco
Cigar and Cigarette Making
Softening
Stemming and Stripping
Filler Tobacco Casing and Conditioning
Filler Tobacco Storage and Preparation
Wrapper Tobacco Storage and Conditioning

10-10
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2008-10-01

Relative
Humidity
%RH

Temperature
°F

°C

75 – 80
70 – 75

24 – 27
21 – 24

55 – 70
50 – 55

75 – 80
75 – 80
70 – 75

24 – 27
24 – 27
21 – 24

50 – 55
60 – 70
50 – 60

75 – 80
70 – 75

24 – 27
21 – 24

55 – 60
55 – 65

75 – 80
75 – 80
70 – 75

24 – 27
24 – 27
21 – 24

55 – 65
65 – 75
55 – 65

75 – 80
70 – 75

24 – 27
21 – 24

50 – 60
50 – 60

75 – 80
70 – 75

24 – 27
21 – 24

50 – 60
50 – 60

75 – 80
75 – 80
70 – 75

24 – 27
24 – 27
21 – 24

35 – 60
50 – 55
50 – 65

75 – 80
75 – 80
70 – 75

24 – 27
24 – 27
21 – 24

55 – 65
55 – 60
60 – 65

75 – 80
70 – 75

24 – 27
21 – 24

50 – 65
50 – 65

75 – 80
75 – 80
70 – 75

24 – 27
24 – 27
21 – 24

55 – 70
50 – 65
50 – 65

76
76

24
24

60 – 65
50 – 60

75 – 80
75 – 80
70 – 75

24 – 27
24 – 27
21 – 24

70 – 85
50 – 60
60 – 70

70 – 75
90
75 – 85
75
78
75

21 – 24
32
24 – 29
24
26
24

55 – 65
85 – 88
70 – 75
75
70
75

Figure 2. Psychrometric Chart

10-10
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2008-10-01

2. STEAM ABSORPTION AND DISTRIBUTION
A. VARIABLES THAT AFFECT ABSORPTION DISTANCES
(1) This manual will help in the design of a steam distribution system to provide the
optimum performance from the humidifier and absorption of steam within the duct
system.
(2) Experience has shown that absorption of steam is affected primarily by the
psychrometric conditions of the air based on how much residual capacity at a given air
volume and temperature exist to hold the moisture being introduced.
(3) To properly introduce steam into an air stream, five variables must be known:
(a) Temperature (°F or °C). If the air temperature varies, pick the lowest temperature.
(b) Highest humidity level before the distributor (%rh).
(c) The amount of moisture being added resulting in a change of rh in the duct or
plenum (Δ %rh).
(d) Minimum velocity of the air (FPM).
(e) The size of the duct or plenum (cross section area).
(4) As a guide, Table 8 shows how each variable affects the absorption distance.
(5) Table 9 shows examples of typical absorption distances in air handling systems.
(6) Referring to Figure 3, ‘D’ can vary between 1 to 20 feet depending on the airflow’s:
(a) Velocity (V)
(b) Temperature (T)
(c) Humidity (H)
(7) When (V) is 500 fpm, (T) is high (90 to 130°F) and (H) is low (10% to 30% rh) the ‘D’ will
be 1 to 2 feet. As the (H) goes up ‘D’ becomes longer. Similarly, as (T) goes down, ‘D’
goes up. High velocity also increases ‘D’ by moving the steam further down stream
before it can mix. Multiple distributors will shorten the steam absorption distance.
Table 8. Variables That Affect Absorption Distances
Variables

Effect On Absorption Distance
(NOTE: ↑ Increase ↓ Decrease

Air Temperature ↑

↓

Air Temperature ↓

↑

Air Humidity ↑

↑

Air Humidity ↓

↓

Large Increase of RH

↑

Small Increase of RH

↓

High Air Velocity (1000 fpm or above)

↑

Low air Velocity (between 100 and 500 fpm)

↓

Small Duct or Plenum (short distributor)

↑

Large Duct or Plenum (long distributor)

↓

10-10
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Table 9. Typical Absorption Distances, Single Distributor, 100 lbs/hr Humidifier
FPM

°F

(V)

°C
(T)

% RH

FT

(H)

CM
(D)

Typical System

500

70

21

30

3.0

91

Air handler before coils

500

55

13

80

4.5

137

Air handler after cooling

900

70

21

30

3.5

107

Supply air duct, on cool, no heat

900

55

13

70

6.0

183

Supply air duct, on cool

1000

55

13

90

8.0

244

Supply air duct, on cool with high humidity

1000

110

43

10

2.5

76

Supply air duct, on heating with low humidity

1000

70

21

45

4.0

123

Return air duct conditions

2000

55

13

45

10.0

305

Supply air duct higher pressure system

5000

140

60

10

2.0

61

After operating heating coil

(V) = Velocity at distributor location
(D) = Absorption distance (visible steam)

(T) = Temperature at distributor location
(H) = Humidity level after steam is absorbed

NOTE: This chart is for reference only; multiple distributors can reduce absorption distances.

Figure 3. Steam Distributor Location

10-10
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B. CALCULATING THE DOWN STREAM HUMIDITY LEVEL
(1) Table 10 indicates the amount of water that each 1000 CFM of duct air holds in pounds
of water per hour at various combinations or air temperature and relative humidity.
Subtract the water vapour in the duct air before the steam distributor from the
maximum allowed after the distributor. The chart indicates how many lbs/hr of water
can be added to 1000 CFM of airflow.
Table 10. Water (lbs/hr) Contained in 1000 CFM of Air
°F

10%

20%

30%

40%

50%

60%

70%

80%

85%

50

3.52

7.04

10.56

14.06

17.60

21.12

24.65

26.16

29.92

55

4.19

8.38

12.57

16.76

20.95

25.14

29.33

33.52

35.62

60

4.97

9.94

14.91

19.88

24.85

29.82

34.79

39.76

42.25

65

5.85

11.74

17.61

23.48

29.35

35.22

41.09

46.96

49.73

70

6.94

13.80

20.82

27.78

34.70

41.64

48.58

55.52

58.99

75

8.10

16.20

24.30

32.40

40.50

48.60

56.70

64.80

68.85

80

9.46

18.92

28.36

37.84

47.30

56.76

66.22

75.68

80.41

85

11.03

22.08

33.09

44.12

55.15

66.18

77.21

88.24

93.75

90

12.80

25.60

38.40

51.20

64.00

76.80

89.60

102.4

108.80

95

14.81

29.62

44.43

59.24

74.05

88.86

103.67

118.48

125.89

100

17.10

34.20

51.20

68.40

85.50

102.60

119.60

136.80

145.54

(2) The following are two examples:
Example 1:
3000 CFM air handler with 60°F and 30% rh air before the steam distributor.
Calculate the maximum rate of steam addition without exceeding 80% rh in the duct.
60° & 80% = 39.76 lbs/hr
60° & 30% = 14.91 lbs/hr
____________________
24.85 lbs/hr can be added to 1000 CFM
x____________
3 (3000CFM)
74.55 lbs/hr can be added to 3000 CFM
If the load calculation of this system requires a 100 lbs/hr unit, then due to the above
possible conditions, the project requires a modulating high limit humidistat to limit the
humidifier output to a maximum of 74 lbs/hr and maintain 80% rh.
Example 2:
Humidification load is 30 lbs/hr. To avoid exceeding 80% rh in the duct, calculate the
minimum allowable CFM at 55°F. Duct conditions are 55°F and 50% rh.
55° & 80% = 33.53 lbs/hr
55° & 50% = 20.95 lbs/hr
____________________
12.57 lbs/hr can be added to 1000 CFM
(30 lbs/hr ÷ 12.57) x 1000 = 2386 CFM minimum

10-10
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2008-10-01

NOTE
Maximum capacity of the NHTC/NHPC humidifier can be limited through the keypad.
C. CONTROL OF DUCT OR PLENUM SATURATION
(1) NORTEC always recommends the use of a high limit humidistat set at 85% relative
humidity in combination with an air-proving switch to assure air movement. Both of
these controls are wired in series across the primary control terminals of the humidifiers
so that should either of these conditions not be satisfied the humidifiers cannot operate.
(2) Low temperature, shallow ducts or branch ducts might require a field supplied
condensate drain pan and should be accessible to service and inspection (See
Figure 4.).
(3) The most effective method of ensuring controlled absorption distances is to install a
modulating high limit humidistat. By controlling the down stream [after distributor(s)]
humidity levels and modulating the humidifier’s output, one of the variables affecting
absorption distance is now a constant. NORTEC recommends modulating high limit
humidistats on all economizer systems, VAV, VVT, and systems, which are primarily
cooling.

Figure 4. Condensate Drain Pan

10-10
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3. STEAM RUNS AND CONDENSATE RETURNS
A. STEAM RUNS
(1) Steam runs between the humidifier and the distributors can be accomplished by using
flexible NORTEC steam hose or insulated copper pipe. The longer the steam run,
including elbows, the lower the efficiency of the system. The more elbows and turns,
the higher the losses become. The humidifier should be as close as possible to the
distributor and the steam run should be as direct as possible.
(2) Guidelines for installation are:
(a) Locate humidifier as close as possible to the duct system.
(b) NORTEC steam hose should only be used on short steam runs below 10 feet.
(c) Minimize elbows and turns.
(d) Ensure that no condensate produced in the steam line will remain trapped. Steam
naturally flows upward and condensate naturally flows downward. Always slope
the steam run towards the steam source at a 15° pitch no more (See Figure 5.).
(e) Oversize condensate line and steam line of long runs (consult your
representative).
(f)

See material recommended for use in Table 11. To eliminate corrosion, NORTEC
does not recommend the use of steel piping.

(g) Consult Table 12 and Table 13 for steam and condensate sizing guidelines when
using steam distributors.

Figure 5. Proper Slope
see Fig 9 for proper P Trap design and installation

10-10
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2008-10-01

Figure 6. Drain Tee

Table 11. Steam Line Material
Short run < 10 feet (3 m)

Steam Hose

Copper Tube

Stainless Steel Tube

yes

yes

yes

yes

yes

Long run > 10 feet (3 m)

NOTE: Steel, Iron and aluminum tubing or pipe must not be used for the steam distribution lines with these humidifiers.
Plastic tubing and pipe also must not be used for steam distribution lines.

Table 12. Recommended Material and Size for Steam Run
Load

Steam Run

lb/hr

kg/hr

ft

m

Steam Line
Material

Steam Line
Description

0-30

0-13

0-10

0-3

Copper Tube

¾" MED-L
Tubing
(f" OD)

0-30

0-13

10 +

3+

Copper Tube

1"MED-LTubing
(1c" OD)

0-30

0-13

0-10

0-3

Stainless Steel
Tube

f" Tube x
0.049" thick.

0-30

0-13

10 +

3+

Stainless Steel
Tube

1c"Tube x
0.049” thick.

30-100

13-45

0-20

0-6

Copper Tube

1½" MED-L
Tubing
(1e"
OD)

30-100

13-45

20 +

6+

Copper Tube

2"MED-L Tubing
(2c"OD)

30-100

13-45

0-20

0-6

Stainless Steel
Tube

1¾" Tube x
0.065" thick.

30-100

13-45

20 +

6+

Stainless Steel
Tube

2" Tube x
0.065" thick.

NOTE: Options shown in a bold-italic font require that reducers be used at both ends. These extra large sizes are to
allow for better condensation removal in long steam runs. These sizes do not permit the use of hose couplings
to connect either humidifier or distributors.
NOTE: Insulate all copper or stainless steel steam lines with minimum one inch high temperature insulation.

Table 13. Recommended Condensate Line at Distributor(s)
Dispersion Method

Condensate Hose

1 x Steam Distributor

d" NORTEC 1328840

3 x Steam Distributor*

d" NORTEC 1328840

Copper Tube
¼" MED-L Tubing
OD)
½" MED-L Tubing
(f" OD)

Stainless Steel Tube
(d"

d" Tube 0.049" thick.
e" Tube 0.049" thick

NOTE: When using more than one distributor, the condensate line should be trapped before it is joined together.

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(3) NORTEC recommends the use of insulated hard copper steam lines on distances of
more than 10 feet and no more than 3 elbows (90⊃). The use of flexible steam hose on
runs of more than 10 feet can reduce these recommended distances in Table 14 by as
much as 25%. Steam hose can crimp and cause back pressure.
Table 14. Maximum Recommended Length of Steam Runs
Unit Size

Steam Output

Distance

Possible Losses

NH-005

5 lbs/hr

8 feet

1.0 lbs/hr

NH-010

10 lbs/hr

15 feet

1.5 lbs/hr

NH-020

20 lbs/hr

20 feet *

2.0 lbs/hr

NH-030

30 lbs/hr

25 feet *

2.5 lbs/hr

NH-050

50 lbs/hr

40 feet **

4.0 lbs/hr

NH-075

75 lbs/hr

50 feet **

5.0 to 10.0 lbs/hr

NH-100

100 lbs/hr

50 feet **

5.0 to 10.0 lbs/hr

NH-150

150 lbs/hr

50 feet/cylinder **

5.0 to 10.0 lbs/hr

NH-200

200 lbs/hr

50 feet/cylinder **

5.0 to 10.0 lbs/hr

* Use one inch copper steam supply for longer runs.
** Use two inch copper steam supply for longer runs.
NOTES: 1. This table gives the maximum recommended length of steam run by unit size.
2. The use of any steam line other than copper or NORTEC supplied steam hose will void the warranty and
may adversely effect the operation of the humidifier.

(4) Steam lines should slope upwards from the humidifier to the steam distributor. (See
Figure 7.)
(5) Flexible steam hose, if used, must be supported to avoid crimps, bends, and sags.
(Please consult local agent if proper slopes are not available.)
(6) If the steam supply line must be routed below the humidifier location, a condensate trap
‘tee’ will be required to prevent blockage at the low point in the steam line. Run the
condensate hose to the nearest floor drain after trapping. (See Figure 8.)
(7) Long steam runs with improper slopes can produce spitting at the distributor because
the steam is travelling at a high velocity and will push condensate out the distributor. If
a slope of 2" for every 12" of steam run cannot be achieved, then condensate must be
removed before the distributor. (See Figure 4.)
B. CONDENSATE RETURN
(1) Each steam distributor has a built-in condensate return. (See Figure 9.) Flexible
condensate return hose (available from NORTEC) is recommended for routing
condensate back into the humidifier’s fill cup, or to a drain. A short length of d" OD
copper tubing is supplied by NORTEC when routing condensate hose back to the fill
cup. Similarly, a short length of d" condensate hose is supplied to serve as a flexible
coupling with field-supplied copper condensate line. Long condensate runs should be
drained to a floor drain to prevent excessive condensate water from entering the
cylinder.
NOTE
Excessively long steam runs (over 20 feet) may require the use of ½" OD condensate
return lines – supplied by others.

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(2) Use vertical condensate leg of
distributor only. Do not
over-tighten clamp.
(3) Drip stations on steam mains must
be located at all low points in the
system, at each elevation change
and or directional change.
(4) Horizontal runs of steam must
have a 2" rise per foot (10°) when
flow is going away from drip station
and the steam run is to fall ½" per
foot (2°) when flow is going
towards drip station.
(5) In a horizontal run of the steam
main, drip stations must be located
at regular intervals of 20 feet.
(6) The drip station itself is a section
of piping connected to the bottom
of the main. A full size tee must be
used to create a drip station to
allow the condensate to fall in the
drip station.

Figure 8. Condensate Tee At Any Low Point
In Steam Line

Figure 7. Steam Line Connection

Figure 9. Trap To Prevent Steam In
Condensate Line

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(7) Vertical drop of the drip station should be 1.5 times the diameter of the steam main but
no less then 12".
(8) Install the P trap at the botom of the drip station. The P trap height is to be a minimum
of 6 inches or 2 “ greater than the static pressure in the duct.
(9) All distributors must be individually trapped.

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4. STEAM DISTRIBUTORS (ASD, BSD, CSD)
A. STEAM DISTRIBUTORS
(1) NORTEC’s steam distributors, in use for over twenty years, are a proven design to suit
applications for the introduction of atmospheric steam.
(2) Features and benefits of steam distributors are:
(a) Expanded diameter of tube to reduce steam velocity and the potential for
condensate carryover into the duct.
(b) Positive removal of condensate.
(c) Lower mass of metal (stainless steel), which reduces ‘radiator effect and
condensate’ and results in higher efficiency of humidifier output while reducing
condensate formation.
(d) Designed specifically for atmospheric steam generation.
(e) Modular so that the exact quantity of distributors can be configured to meet
specific application requirements. This reduces system complexity and installation
costs.
B. DISTRIBUTOR CHARACTERISTICS
(1) NORTEC steam distributors are constructed of stainless steel and include in low point
condensate return to prevent the condensate from collecting in the steam distributor.
This enables entrained condensate to settle to the bottom of the steam distributor
where it is removed by the condensate return. These features allow the NORTEC
steam distributors to be installed level in the duct, thereby utilizing the full available
width of the duct. (See Figure 10.)

Figure 10. Levelling the Distributor

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(2) Ensure the total capacity of the humidifier is not higher than the allowable maximum
steam capacity of the following distributors:
(a) ASD: 25 lbs/hr (9 kg/hr)
(b) BSD: 35 lbs/hr (13 kg/hr)
(c) CSD: 115 lbs/hr (45 kg/hr)
C. DISTRIBUTOR LOCATIONS AND MOUNTING
(1) NORTEC distributors can be mounted in air handlers, supply air ducts or return air
ducts. Return air ducts should only be considered if all of the return air enters the
building again and is not exhausted by the air handling device. Distributors should be
mounted center or low within the duct or plenum. (See Figure 11.) Laminar airflow is
best. Down stream obstruction must be considered. The non-absorbed steam may
affect devices like smoke detectors down stream. Total steam absorption must be
accomplished before filters and silencers.
(2) Distributors come complete with a mounting plate. (See Figure 12.) Most ducts and
plenums are rigid enough to support the distributor.
(3) Longer distributors (more than 36") and distributors mounted on lighter gage sheet
metal which cannot support the distributor level in the duct will need to be supported on
the end. (See Figure 10.)
D. MULTIPLE DISTRIBUTOR APPLICATIONS
(1) The use of multiple steam distributors can reduce the absorption distance in most
situations. Distributors can be manifolded together to create a grid to achieve shorter
absorption distances. (Consult agent and/or see Nomogram Figure 13.

CAUTION
THESE INSTALLATION
GUIDELINES APPLY FOR DUCT
VELOCITIES UNDER 2000 FT/
MIN (610 M/MIN), PLEASE
CONSULT FACTORY FOR
HIGHER VELOCITIES

CAUTION
PLEASE MAKE SURE NO
OBSTACLES (ELBOW, FILTER,
OR DIFFUSER) ARE LOCATED
AFTER THE DISTRIBUTOR IN
THE DIRECTION OF THE
AIRFLOW CLOSER THAN THE
ABORPTION DISTANCE
CALCULATED FOR YOUR
APPLICATION.

CAUTION
FOR APPLICATIONS WITH
HIGH STATIC PRESSURES
PLEASE CONSULT FACTORY

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Figure 11. Single Steam Distributor
Installation – Minimum Clearance

Figure 12. Cutting Duct For Mounting

Figure 13. Humidification Distance Nomogram

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CAUTION
UNLESS YOU KNOW THE EXACT ABORPTION DISTANCE
REQUIRED FOR THE STEAM ABSORPTION INTO THE AIR STREAM,
THE DISTRIBUTOR SHOULD BE LOCATED AT LEAST 8-10 FT (2-3 M)
AWAY FROM ANY OBSTACLE IT MAY CONDENSE ON (ELBOW,
DIFFUSER, FILTER, ETC.)
(2) Duct vertical clearance requirements for standard steam distributors are as follows:
(a) ASD

- 8 in. vertical duct height for 1st ASD
- 5.5 in. additional duct height for each additional ASD
= ROUNDDOWN (‘DuctHeight’ - 8")/5.5) + 1

(b) BSD

- 10 in. vertical duct height for 1st BSD
- 6.375 in. additional duct height for each additional BSD
= ROUNDDOWN (‘DuctHeight’ - 10")/6.375) + 1

(c) CDS

- 14 in. vertical duct height for 1st CSD
- 9 in. additional duct height for each additional CSD
= ROUNDDOWN (‘DuctHeight’ - 14")/9) + 1
NOTE

These requirements apply to vertical arrangements of multiple distributors ONLY.
Diagonal arrangements utilize an alternative method.
E.

LOCATION OF STEAM DISTRIBUTORS WITHIN AN AIR HANDLER
(1) Humidify after the heating
coil (H/C) so that absorption will
occur in the 3 to 4 feet before the
cooling coil (C/C). If steam carries
over and condenses on the coil,
any excess water will be drained
away. There is little chance of
condensation on the blower,
blower motor, or fan isolation
components, especially if you use
a modulating high limit humidistat.
All steam distributors should be 8"
from the H/C and evenly spaced. If
wetting is a problem, add more
steam distributors. (See
Nomogram Figure 13 and
Figure 14).

F.

DISTRIBUTOR ABSORPTION
DISTANCE
(1) The water vapor discharged from
the steam distributor must be
adequately mixed with air to
prevent condensation on
downstream components. The
nomogram in figure 13 will

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Figure 14. Best Location for Multiple Steam
Distributors in AHU

determine the number of steam distributors that must be use for short saturation
distances.
(2) If the ‘Saturation Distance’ for one steam distributor is not sufficient, add more steam
distributors until the minimum saturation distance is attained. (See Figure 13.)
(3) To determine the number of distributors required, complete the following list:
(a) Air humidity after humidification _____ %rh. (A high limit humidistat should be set
at 80 – 85% to prevent wetting of ducts.)
(b) Air temperature before humidification _____.
(c) Air velocity in duct _____ ft/min.
(d) Maximum steam mass flow _____ lbs/hr.
(e) Active zone H of steam distributor _____ in. (See Figure 13.)
NOTE
The manufacturer recommends the appropriate distance modification factors when
filters or humidification sensors are installed downstream. For applications that are
outside of the Nomogram’s range, please consult a NORTEC representative.
G. TYPICAL APPLICATIONS
(1) Representations of typical applications are found in Figure 15 and Figure 16.
H. DISTRIBUTOR DIMENSIONS
(1) Distributor dimensions for the various distributor models can be found in
Chapter 10-30.

Figure 15. Roof Top Units 2-20 Tons –
Typical Location

Figure 16. Small Units On Residential
Furnaces

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5. SHORT ABSORPTION MANIFOLD (SAM-e)
A. GENERAL
(1) NORTEC’s best performing steam absorption system for use in Air Handling Units and
duct systems where short steam absorption distance is critical.
(2) The SAM-e, Figure 17, distributes clean steam, precisely controlled, uniformly into the
entire air stream, void of any condensate spray. Steam distribution takes place via
distributor tubes with integrated nozzles. The steam is kept dry as condensate is
drained through the main header.
(3) The stainless steel distribution tubes are typically mounted vertically but can also be
mounted horizontally (10° slope) for vertical airflow applications. The distribution tubes
come equipped with evenly spaced stainless steel nozzles providing optimum steam
distribution, over the entire length of the tube.
(4) The nozzles extend into the center of the distribution tube ensuring only condensate
free steam is released. (See Figure 18.) Condensate drains out of the distribution
tubes, through the header, eliminating the need for jacketed tubes. A permanent bond
between the nozzle and distribution tube is made when the nozzle is pressed into the
tube. The nozzles and tubes have the same thermal expansion characteristics
guaranteeing a permanent union. The specifically sized orifices ensure consistent
output from each nozzle.

Figure 17. SAM-e Tubes

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Figure 18. Cross-Section of Distributor Pipe

(5) The features of the short absorption manifold are:
(a) Inlets/Outlets located on same side, one access point required.
(b) All stainless steel distributors and nozzles ensure permanent bond.
(c) Stainless steel header with rubber grommet seals for easy installation of
distribution tubes.
(d) Adjustable mounting frame available for quick and easy installation.
(e) Available with 3", 6", 9", or 12" center-to-center distributor spacing.
(f)

Atmospheric steam source.

(g) Two year limited warranty.
B. DETERMINING THE STEAM ABSORPTION DISTANCE
NOTE
Visit www.humidity.com to download our Humidification Engineering & Loadsizing
Program (H.E.L.P.) to help you calculate the absorption distance.
(1) Injecting steam into the air requires a certain amount of time before the steam is
absorbed completely.
(2) In a moving air stream, this time results in the steam moving a fixed distance from the
manifold before it is fully absorbed.
(3) Knowing the absorption distance will ensure that steam will not condense on any
critical components following the steam distribution area.
(4) The system should be designed to eliminate the possibility of wetting internal
components by positioning the manifold in the optimum location and by keeping the
absorption distance to a minimum.
(5) The absorption distance can be calculated using the Z ratio. The Z ratio and the
following method may be used as a guide to calculate the absorption in various air
handlers, and ducts with different conditions. It can be calculated as follows:
(RHah - RHbh)
––––––––––
(100 - RHbh)
RHah = Percentage of relative humidity after humidification.
RHbh = Percentage of relative humidity before humidification.
Z=

Example 1:
• 55°F (12.8°C)/ 12% RH - Conditions before humidification.
• 20 000 CFM (33 980 m3/h)
• 400 lbs/hr (181 kg/hr) load
Using the H.E.L.P. Software or a psychrometric chart you can find that the
humidity conditions after adding 400 lbs/hr (181 kg/h) of steam, are 55°F (12.8°C)
61% rh.
Thus giving:
RHbh = 12%
RHah = 61%
Z= (61 - 12) / (100 - 12) = 0.56

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(6) Absorption Distances:
3" centers = 7" (18 cm)
6" centers = 9" (23 cm)
9" centers = 12" (31 cm)
12" centers = 18" (46 cm)
(7) Reference Figures 19, 20, 21 and 22 to determine the center-to-center spacing
required.
NOTES
1. The absorption distance data is based on 55°F (13°C) minimum temperature
before humidification.
2. Data is based on velocities between 200 fpm (101 cm/s) and
2500 fpm (1270 cm/s).
3. Absorption distance: This is the distance between the SAM-e and the first
obstruction (coil, elbow, damper, etc.) and the first obstruction steam may hit.
Traces of steam may pass this obstruction, but will not condense, leaving
obstructions dry.
4. If any of the duct AHU conditions are changed, the absorption distance may
change due to increase or decrease in duct temperatures, amount of fresh air,
various outside conditions, set point requirements, etc. If this occurs, re-calculate
the absorption distance, and determine if the SAM-e needs to be modified or
relocated.
C. STATIC AIR PRESSURE
(1) Table 15 shows the static pressure loss created by a SAM-e in various velocities.
Table 15. Air Pressure Loss in AHU/Duct
Air Pressure Loss (inches of water column)
Air Velocity fpm
(cm/s)
500 (255)

SAM-e Tube Spacing
3" (7.6 cm)

6" (15.2 cm)

0.01 (0.02)

0.01 (0.02)

750 (383)

0.03 (0.08)

0.01 (0.02)

1000 (510)

0.05 (0.013)

0.02 (0.05)

1250 (638)

0.07 (0.18)

0.03 (0.08)

1500 (765)

0.09 (0.23)

0.04 (0.10)

9" (22.7 cm)

12" (30.5 cm)

No measurable data

0.01

0.01

1750 (893)

0.10 (0.25)

0.06 (0.15)

0.01

0.01

2000 (1020)

0.12 (0.30)

0.08 (0.20)

0.01

0.01

D. CONDENSATE LOSSES
(1) The SAM-e will condense some of the steam generated by the NORTEC humidifiers.
To compensate for this loss in capacity, we must increase the calculated humidification
load accordingly. Refer to Table 16.

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Figure 19. Absorption Distance – 3" Centers

Figure 20. Absorption Distance – 6" Centers

Figure 21. Absorption Distance – 9" Centers

Figure 22. Absorption Distance –
12" Centers

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(2) NORTEC recommends the installation of a condensate drain on the steam inlet run
prior to entering the SAM-e.
Table 16. Condensate Loss
Condensate Losses (% of Maximum Capacity)
Air Velocity fpm (cm/s)
55°F

70°F

500 (255)

15%

12%

1000 (510)

20%

15%

NOTE: These values may increase or decrease due to many unknown conditions or variables. This is only a guideline.

E.

CORRECT CHOICE OF PRODUCT APPLICATIONS (WITHIN SAM-e)
(1) The SAM-e has been designed exclusively for use in building ventilation duct systems,
where manufacturing, processing and hi-tech activities are conducted. Applications that
do not conform to the design parameters are not recommended and will be at the
user’s own risk. NORTEC produces a wide range of different humidification systems to
suit virtually all normal applications, and will be happy to recommend the most
appropriate system to suit each particular requirements.

F.

SAM-e DIMENSIONS
(1) Dimensions for the SAM-e and mini SAM-e can be found in Figure 6 and Figure 7 in
Chapter 10-30.

G. SAM-e HEADER SELECTION
(1) NORTEC offers different ranges of manifolds to cover capacities and duct sizes. The
absorption distance and capacity required will determine the center to center spacing
between each steam tube on the header. There are four options: 3" (7.6 cm),
6" (15.2 cm), 9" (22.9 cm) or 12" (30.5 cm). The smaller the spacing, the more tubes
the header can accommodate, thus giving a better absorption distance and greater
capacity. (See Tables 17 to 20.)
(2) The header remains the same for in-duct or outside duct mounting, for atmospheric
steam, and for vertical or horizontal flow applications. (See Figure 23.)
(3) Atmospheric manifolds with a capacity over 801 lbs/hr (362 kg/hr) will include a second
steam inlet on the header. Consult factory submittal drawings for specific details.
(4) Select the header part number associated with your duct or air handling unit’s width.
For example, if the duct width is 80" (198.11 cm), select part number 150-3279 for
3" (7.6 cm) center-to-center spacing.
H. SAM-e STEAM TUBE SELECTION
(1) Constructed of 1.5" (3.81 cm) OD 304 stainless steel tubing, the steam tubes can
accommodate duct heights between 18" (45.72 cm) - 144" (365.76 cm) for in-duct
header mounting. For smaller duct applications, a mini SAM-e can accommodate sizes
starting at 12" (30.5 cm) wide x 8" (20.3 cm) high. (See Figure 20.) Each steam tube
has a different amount of stainless steel nozzles to evenly disperse steam into the duct
or air handling unit. The nozzles take the steam from the center of the tube, eliminating
any need for jacket heating, and a temperature switch. All the accumulating
condensate is drained vertically down to the main header, and then out the condensate
drain. NORTEC’s unique ‘slip in’ installation method makes for a very quick and
effortless assembly. (See Figure 24.)

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(2) There is a selection of four types of
steam tubes. Each are capable of
distributing different capacities. To
select the steam tube for your
application refer to Table 17.
Type A
Type B
Type B+
Type C

15 lbs/hr
35 lbs/hr
55 lbs/hr
75 lbs/hr

(7 kg/hr)
(16 kg/hr)
(25 kg/hr)
(34 kg/hr)

(3) The humidifiers maximum capacity
and SAM-e header will determine
the steam tube type required. The
selected header will determine
how many steam tubes are
required, refer to Tables 18, 19, 20
and 21. Remember to calculate
your condensate losses.

Figure 23. SAM-e Header

Figure 24. SAM-e Tubes

Figure 25. Steam Inlet

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I.

SAM-e STEAM INLET CONFIGURATION SELECTION
(1) Atmospheric Steam (NH, GS, SE)
(a) The steam inlet, Figure 25, is determined by the selected humidifier. Refer to
submittals, Chapter 10-30 to determine the size of steam outlet required.
(b) For a typical SAM-e installation, see Figure 26.

J.

MINI SAM-e
(1) For the mini SAM-e installation, refer to Tables 18, 19, 20 and 21 for headers, tubes
and inlet configuration.
Table 17. SAM-e Tube Matrix

*In-Duct
Height
in. (cm)

In-duct OutsideTYPE A
TYPE B TYPE B+ TYPE C
‘L’
Duct
Optional
15 lbs/hr 35 lbs/hr 55 lbs/hr 75 lbs/hr Dimension Mounting Optional
(7 kg/hr) (16 kg/hr) (25 kg/hr) (34 kg/hr)
in. (cm)
Frame Mounting
Frame

18 (45.7)

1503388

N/A

N/A

N/A

5.5 (14.0)

1504697
1504697

24 (61.0)

1503389

1503411

N/A

N/A

11.5 (29.2)

30 (76.2)

1503390

1503412

1509391

N/A

17.5 (44.5)

36 (91.4)

1503391

1503413

1509392

1503440

23.5 (59.7)

42 (106.7)

1503392

1503414

1509393

1503441

29.5 (74.9)

48 (121.9)

1503393

1503415

1509394

1503442

35.5 (90.2)

54 (137.2)

1503394

1503416

1509395

1503443

41.5 (105.4)

60 (152.4)

1503395

1503417

1509396

1503444

47.5 (120.7)

66 (167.6)

1503396

1503418

1509397

1503445

53.5 (136.9)

72 (182.9)

1503397

1503419

1509398

1503446

59.5 (151.1)

78 (198.1)

1503398

1503420

1509399

1503447

65.5 (166.4)

84 (213.4)

1503399

1503421

1509400

1503448

71.5 (181.5)

90 (228.6)

1503400

1503422

1509401

1503449

77.5 (196.9)

96 (243.8)

1503401

1503423

1509402

1503450

83.5 (212.1)

102 (259.1)

1503402

1503424

1509403

1503451

89.5 (227.3)

108 (274.3)

1503403

1503425

1509404

1503452

95.5 (242.6)

114 (289.6)

1503404

1503426

1509405

1503453 101.5 (257.8)

120 (304.8)

1503405

1503427

1509406

1503454 107.5 (273.1)

126 (320.0)

1503406

1503428

1509407

1503455 113.5 (288.3) 1503472

132 (335.3)

1503407

1503429

1509408

1503456 119.5 (303.5)

138 (350.5)

1503408

1503430

1509409

1503457 125.5 (318.8)

144 (365.8)

1503409

1503431

1509410

1503458 131.5 (334.0)

1503469
1503469

1503470
1503470

1503471
1503471

1503472

NOTE: *Add 6" (15.2 cm) to In-Duct Height for Outside-Duct Mounting of Header.

10-10
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Steam Tube Profile

Table 18. Mini SAM-e Headers – 3"
Duct Width
in. (cm)

Steam Tubes Qty

12 (30.5)

3

18 (45.7)
24 (60.9)

Header
Part Number

Maximum Capacity Atmospheric lbs/hr (kg/hr)
MA

MB

MC

1509811

30 (14)

60 (27)

90 (41)

5

1509812

50 (23)

100 (45)

150 (68)

7

1509813

70 (32)

140 (64)

210 (95)

Table 19. Mini SAM-e Headers – 6"
Duct Width
in. (cm)

Steam Tubes Qty

12 (30.5)

2

18 (45.7)
24 (60.9)

Header
Part Number

Maximum Capacity Atmospheric lbs/hr (kg/hr)
MA

MB

MC

1509814

20 (9)

40 (18)

60 (27)

3

1509832

30 (14)

60 (27)

90 (41)

4

1509833

40 (18)

80 (36)

120 (54)

Table 20. Mini SAM-e Tubes
*In-Duct
Height
in. (cm)

TYPE MA
10 lbs/hr
(25 kg/hr)

TYPE MB
20 lbs/hr
(9 kg/hr)

TYPE MC
30 lbs/hr
(14 kg/hr)

In-duct
Optional
Mounting
Frame

‘L’ Dimension
in. (cm)

8 (20.3)

1509788

N/A

N/A

4½" (11.4)

10 (25.4)

1509789

N/A

N/A

6½" (16.5)

12 (30.5)

1509790

1509797

1509804

8½" (21.6)

14 (36.6)

1509791

1509798

1509805

10½" (26.7)

16 (40.6)

1509792

1509799

1509806

18 (45.7)

1509793

1509800

1509807

14½" (36.8)

20 (50.8)

1509794

1509801

1509808

16½" (41.9)

22 (55.9)

1509795

1509802

1509809

18½" (47.0)

24 (60.0)

1509796

1509803

1509810

20½" (52.1)

Not Required

Steam Tube Profile

12½" (31.8)

Table 21. Mini Inlet Configurations – For Atmospheric Steam Unit
SAM-e Steam Inlet

Part Number

f" OD

1509839

1¾" OD

1509837

2 X 1¾" OD

1509838

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Figure 26. Typical SAM-e Installation for Atmospheric Steam Applications

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6. BLOWER PACKS (BOBP, RMBP)
WARNING
STEAM DISTRIBUTOR ON THE BUILT-ON AND REMOTE BLOWER
PACKS HAVE A HOT SURFACE THAT COULD RESULT IN BURNS IF
TOUCHED. NORTEC RECOMMENDS MOUNTING AT LEAST 8 FEET
ABOVE THE FLOOR.
A. BLOWER PACKS
(1) Optional blower packs are used to distribute steam to localized areas such as computer
rooms or in areas that do not have a built-in air distribution system.
(2) Blower packs are available integrally mounted on humidifier BOBP, (See Figure 27.) or
detached and field-piped and wired to humidifier RMBP. (See Figure 28.)
(3) Blower packs consist of a matching powder coated steel cabinet containing: three axial
blowers with finger guards powered by 120 VAC or line voltage humidifiers, with built-in
multi-tap transformer (when necessary), fuse, high temperature plastic distributor with
stainless steel lid, horizontal and vertical adjustment knobs for directional control, builtin thermostat to activate blowers, speed control rocker switch and safety loop relay.
(4) Refer to Table 22 for ceiling and frontal clearances required for blower packs.
Dimensions apply to both built-on and remote-mounted versions of blower packs.
(5) Mount remote blower pack(s) using factory supplied wall mounting bracket with
clearances as recommended in Table 22.

Figure 27. NH Series Humidifier With
Built-On Blower Pack

Figure 28. NH Series Remote Mounted
Blower Pack

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Table 22. Ceiling and Frontal Clearances for Blower Packs
NH Series Model

Minimum Number Of
Blower Packs

Minimum Ceiling Clearance
in. (cm)

Minimum Front Clearance
in. (cm)

005

1

18 (45)

30 (76)

010

1

18 (45)

30 (76)

020

1

18(45)

36 (91)

030

1

18 (45)

72 (183)

050

1

36 (91)

84 (213)

075

1

42 (106)

144 (366)

100

1

48 (122)

156 (396)

150

2*

42 (106)

144 (396)

200

2*

48 (122)

156 (396)

NOTES: 1. Remote mounted only. Four remote mounted blower packs are recommended on the 200 model.
2. Clearances based on 72°F at 35% RH.

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7. CONTROLS
A. GENERAL
(1) NORTEC humidifiers all accept on/off controls for their security loop. Many NORTEC
humidifiers can also accept modulating or transducer signals for control (See the
features section for each specific model).
CAUTION
REGARDLESS OF SELECTING ON/OFF OR MODULATING CONTROL
METHOD, NORTEC HUMIDIFIERS MUST HAVE CLOSED CIRCUIT
ACROSS ITS ON/OFF SECURITY LOOP CONTROL TERMINAL TO
OPERATE. NORTEC HIGHLY RECOMMENDS THE USE OF A HIGH
LIMIT HUMIDISTAT AND AN AIR PROVING SWITCH IN SERIES FOR
THIS FUNCTION.
B. ON/OFF CONTROLS
(1) On/Off controls are used in all NORTEC humidifier security loops. The digital
humidistat can also be used as a space humidity controller. These controls include:
(a) Air Proving Switch – duct mounted, pressure differential switch, adjustable set
point from 0.07 IWC to 12.0 IWC, good for positive, negative or differential
pressure applications, stops humidifier if duct air pressure is not sensed. Turns
humidifier off if air handler fails.
(b) Duct Mounted Digital Humidistat – control or high limit, adjustable set point from
15-90% rh with accuracy fixed at ±3% at 25°C, operating range of 0-95% rh, closes
on humidity drop for control and opens on rise for high limit duct application.
(c) Wall Mounted Digital Humidistat – control or high limit, adjustable set point from
15-90% rh with accuracy fixed at ±3% at 25°C, operating range of 0-95% rh, closes
on humidity drop for control and opens on rise for high limit application.
(d) On/Off Controls Supplied by Others – Can be used as long as they have a dry set
of contacts capable of passing a 24-VAC, 2-A maximum signal.
C. MODULATING CONTROLS
(1) Modulating Controls are used to send a modulating demand signal to the NORTEC
humidifier. Different models can accept different signals (see features section for each
specific model) NORTEC supplied controllers send a 0-10 VDC demand signal. This
signal can be used as a control and in some models can also be used as a modulating
high limit. These controls include:
(a) Wall Mounted Digital Humidistat with Integrated Sensor – control or high limit,
adjustable set point from 15-90% rh with accuracy fixed at ±3% at 25°C, outputs a
0-10 VDC signal.
(b) Wall Mounted Digital Humidistat Without Sensor – control or high limit, adjustable
set point from 15-90% rh with accuracy fixed at ±3% at 25°C, outputs a 0-10 VDC
signal. Requires a remote transducer sensor supplying a 2-10 VDC signal.
(c) Duct Mounted Digital Humidistat With Sensor – This package comes with both a
remote sensor and a wall mounted controller without sensor. Control or high limit,
adjustable set point from 15-90% rh with accuracy fixed at ±3% at 25°C, outputs a
0-10 VDC signal.

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(d) Modulating Demand Signal Supplied by Others – A signal that is a linear demand
signal that rises on need for humidity can be used in conjunction with NORTEC
humidifiers. See features section for a list of which models can accept which
signal)
D. OUTDOOR TEMPERATURE SETBACK
(1) The outdoor temperature setback sensor is used to prevent condensation on windows
or other surfaces that are adjacent to outdoor air. This sensor can be used in
conjunction with the NORTEC controls mentioned above (both the on/off and
modulating demand signal controllers) The sensor allows the controller to override the
set point to prevent the humidifier from humidifying when condensation could be
possible. (See Figure 29.) Locate the temperature sensor near the fresh air intake. This
will ensure accurate representation of the outdoor air temperature.
E.

TRANSDUCER SENSORS
(1) Transducer Sensors are signals sent back to either a controller or back to the
humidifier. Limited models can accept a direct transducer signal. (See features section
for each specific model) The sensors include:
(a) Wall Mounted Humidity Transducer – Sensor, output of 2-10 VDC, range of 0 to
95% rh.
(b) Duct Mounted Humidity Transducer – Sensor, output of 2-10 VDC, range of 0 to
95% rh.
(c) Transducer Sensor By Others – Humidity sensors that rise linearly with the sensed
rh in the room.

Figure 29. Set Point Versus Outdoor Temperature

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F.

POSITIONING CONTROLS AND SENSORS
(1) When positioning controls and sensors, ensure other factors do not influence these
devices and give incorrect inputs to the unit. Some of these influences are:
(a) The wall humidistat should not be installed on an outside wall or hot or cold
surface.
(b) The sensor should be installed away from any heat source and away from direct
sunlight and away from any water vapor producing source.
(c) The wall surface should be flat and clean.
(d) Any draft originating from the wall interior should be prevented from interacting
with the humidity sensor. A vapor barrier should be installed.
(e) Location of sensor must be representative of space humidity therefore avoid
drafts, temperature variation or overhangs that may prevent the sensor from
sensing an accurate representation of the space humidity.
(f)

Duct sensors should be placed in a location that assures any and all absorption
has been accomplished.

G. NORTEC ONLINE
(1) NORTEC OnLine enables secure, internet based monitoring, simplifies interoperability
and automated email service notification. Using standard Internet Explorer, version 6.0
or newer, NORTEC OnLine provides both monitoring and control, from any location
with Internet access, for a period of one year. (See Figure 30.) During the service
period, NORTEC OnLine will also generate automatic e-mails when scheduled service
is required and/or abnormal operation occurs. Up to three customer(s) e-mail
addresses may be added to the automatic notification feature, to provide instant
notification.
(2) NORTEC OnLine factory technicians will remotely view each humidifier weekly and
record key status information, which will be used for an annual report to the key
customer contact. This contact will also receive notification of corrections, or service
recommendations from the NORTEC OnLine technician responding to automated
e-mail notifications.
(3) The factory-installed NORTEC OnLine controller is located internally to the humidifier.
(4) Key features of NORTEC Online include:
(a) Graphical representation of humidifier performance
(b) Enable/disable humidifier
(c) Adjust %rh set point(s), if equipped
(d) Adjust manual Limited Capacity
(e) Automated e-mail advisories for scheduled service or abnormal conditions
(f)

Up to fifty incidents, of factory direct support and follow-up

(g) First year of remote access includes factory direct monitoring
(h) Weekly checks by NORTEC OnLine factory technicians
(i)

Remote factory diagnostics and programming capability

(j)

Individual account access to www.norteconline.com.

(k) Monitor up to seventy parameters from each humidifier

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Figure 30. NORTEC OnLine Monitoring

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(l)

Access to service history

(m) Option to add up to seven slave humidifiers to each NORTEC OnLine module
(n) Monitor up to eight humidifiers (one master, seven slaves) with one Internet
connection
(o) Up to three years of coverage can be purchased at time of order
(p) Secure 128-bit Internet connectivity (SSL)
(5) Different networking configurations may be achieved and are mostly dependant on the
type of network present at the site. Specify at the time of order using the form in
Figure 31. Connection options include:
(a) Static IP connection
(b) DHCP (dynamic IP)
(c) GPRS connection
(d) Dial-up modem connection.
H. NORTEC LINKS
(1) Provides a network connection to a BMS system using one of the following protocols:
(a) BACnet IP
(b) BACnet MSTP
(c) LonWorks
(d) Modbus (Standard on the NHTC and NHTC Outdoor)
(e) Johnson N2.
(2) NORTEC Links provides monitoring and control allowing humidifier(s) to communicate
to your Building Management System (BMS). The controller is factory installed and is
located internally to the humidifier. NORTEC Links can be integrated with NHTC,
NHSC/DI, GSTC/SETC technologies. Simply specify at time of order, using the form in
Figure 32, what operating protocol you are using BACnet IP, BACnet MSTP,
LonWorks, Modbus or Johnson N2.
(3) Some features of NORTEC links are:
(a) Digital feedback for unit standby/humidifying mode.
(b) Digital feedback for service required.
(c) Digital feedback for fault indication.
(d) System demand display.
(e) Control enable/disable.
(4) Combined with direct sensor connection to either the humidifiers or BMS it is also
capable of:
(a) Control room set point
(b) Control high limit set point
(c) Control room %rh
(d) Control high limit %rh.

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I.

TYPICAL INSTALLATION LAYOUT FOR NHTC/NHPC
(1) The following are examples of typical control installation possibilities. There are many
more configurations possible, be sure to consider the application and positioning as a
priority. Figures 33, 34, 35, and 36 show typical control installation.

J.

NORTEC CONTROLLER DIMENSIONS
(1) See dimensions in Chapter 10-30.

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NORTEC ONLINE CONFIGURATION FORM
Please complete the information below.
Attention:

Date:

Company:

Fax #:

From:

Page:

Subject:

of

NORTEC Online Information

G FOR YOUR INFORMATION

G RESPONSE REQUESTED

Agent P.O. Number: ____________________

Sales Order Number: ____________________

Desired NORTEC Online Connection Type:
‰ Static IP connection
‰ DHCP (dynamic IP)
‰ GPRS connection
‰ Dial-up modem connection

Settings for Static IP Connection:
Module IP Address:
____________________
Subnet Mask:
____________________
Default Gateway Address: ____________________
Primary DNS:
____________________
Secondary DNS:
____________________

Setting for GPRS Connection:
User Name:
____________________
Password/PIN Code: ____________________
APN String:
____________________
Connection String: ____________________

Settings for Dial-up Modem Connection:
User Name:
____________________
Password:
____________________
Phone Number to dial: ____________________

Humidifier Ordering

Email Addresses for Event Notification:
Email Contact 1: ____________________
Email Contact 2: ____________________
Email Contact 3: ____________________

Humidifier
Model/Size

Unit
Designation

Desired Unit
Order
Lead Humidifier
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6

Be sure to include complete dial-up number string such as area code if
necessary.

End User Information
Time Zone:
____________________
Company Name:
____________________
Address:
____________________
____________________
____________________
Phone Number:
____________________
Main Contact Person: ____________________

Unit 7
Unit 8

Figure 31. NORTEC Online Configuration Form

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NORTEC LINKS FORM
Please complete the information below.
Attention:

Date:

Company:

Fax #:

From:
Subject:

Page:

of

NORTEC Links Information

G FOR YOUR INFORMATION

G RESPONSE REQUESTED

MESSAGE
Agent P.O. Number: ____________________

Sales Order Number: ____________________

Desired NORTEC Links Option:
‰ BACnet/IP
‰ BACnet/MSTP
‰ Johnson N2
‰ LonWorks

Settings for BACnet/IP only:
Default Gateway Address: ____________________
Network Number:
____________________
Subnet Mask:
____________________
Module IP Address:
____________________

Humidifier Ordering:
Humidifier
Model/Size

Desired Unit Order
Lead Humidifier
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
Unit 10
Unit 11
Unit 12
Unit 13

For all GS/SE humidifiers equipped with
NORTEC Links and NH units with BACNET/IP.

Figure 32. NORTEC Links Form

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Figure 33. Humidifier Controlled by Air Proving, On/Off Duct Mounted High Limit and
Modulating Wall Mounted Space Controller

Figure 34. Humidifier Controlled by Air Proving, Modulating Duct Mounted High Limit and
Modulating Wall Mounted Space Controller

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Figure 35. Humidifier Controlled by Air Proving, Modulating Duct Mounted High Limit and
Modulating Wall Mounted Return Air Sensor with Wall Mounted Controller

Figure 36. Humidifier Controlled by Air Proving, Duct Mounted High Limit Sensor and
Modulating Duct Mounted Return Air Sensor with Networking Option

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10-20
SPECIFICATIONS

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SPECIFICATIONS
1. HUMIDIFIERS
A. GENERAL
(1) Work Included
(a) NORTEC NH Series electrode steam humidifier(s) as indicated on drawing(s) and
as indicated on schedule(s).
(b) Complete and operable humidification system (which meets applicable building
codes).
(c) Equipment start-up and project inspection by qualified factory trained
representative.
(2) Submittals
(a) Submit product data under provisions of Section 15010. Include product
description, model, dimensions, component sizes, rough-in requirements, service
sizes, and finishes. Include rated capacities, operating weights, furnished
specialties, and accessories.
(b) Include piping details, plans, elevations, sections, details of components, and
dispersion tubes. Submit wiring diagrams including power, signal, and control
wiring.
(3) References
(a) Certifications, C-UL_US Listed.
(b) ISO 9001-2000.
(c) ANSI/NFPA 70 – National Electrical Code.
(d) ARI 640, ‘Standard for Commercial and Industrial Humidifiers’.
(e) ASHRAE SSPC 135 BACnet, ANSI/EIA 709.1 LonTalk.
(4) Warranty
(a) Product shall be warranted to be free from defects in material and workmanship for
a period of two years after installation or 30 months from manufacturers ship date,
whichever date is earlier. If operating with NORTEC web-based service program
warranty is extended to 42 months from ship date.
B. PRODUCTS
(1) Electrode Steam Humidification System – NORTEC Model NHTC
(a) NORTEC NHTC electrode steam generating system using regular type potable
water supply.
(b) Packaged unit, wall mounted, requiring steam distributor(s) or Short Absorption
Manifold(s) for mounting into AHU/duct(s) or Remote/Built-On Mounted Blower
Pack(s) for direct space applications. Refer to Humidifier Dispersion Options in
paragraph B.(4).
(c) Atmospheric pressure steam generation and mineral separation contained within
an electrode steam cylinder(s). Resistive element technology and boiler steam
(pressure steam) technology not acceptable. The disposable electrode steam
cylinder shall have:
1

Published life expectancy.

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2

Published replacement pricing.

3

Cylinder seams must be spin welded to ensure long-term water tightness and
leak resistance.

4

Integral electronics to ensure safe operation.

5

High water sensor circuitry to prevent over filling.

6

Efficient operation over a wide range of water conditions.

7

Simple maintenance without disassembly or removal of humidifier. No
specialized tools required.

8

Full output and maximum energy efficiency through entire cylinder life.

9

‘Drain through bottom’ to ensure highest mineral concentration is effectively
removed. Simple skimmers are not acceptable.

10 Large perforated strainer at drain outlet to prevent blockage of drain valve or
drain lines.
11 Tool-less primary electrical connection for use with factory installed, spring
loaded, gold plated connectors.
12 Safety characteristics ensuring no current flow with absence of water,
independent of safety controls. Resistive element not acceptable.
(d) Unit(s) to be complete with:

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1

‘Total Controller’ microprocessor to control all humidifier functions with
interface capabilities for remote communication technologies, including
Internet or BMS requirements.

2

Advanced water management utilizing the patented Proportional plus Integral
Autoadaptive control system for optimal energy efficiency, water usage and
cylinder life.

3

Microprocessor controlled fill valve and drain valve allowing automatic water
management.

4

Internal drain water tempering to ensure maximum 140°F (60°C) drain water.

5

Integral fill cup with minimum 1-inch (25-mm) air gap to prevent back
siphoning.

6

Smart cylinder EPROM for improved operation providing:
a

Cylinder identification with model, data, and capacity.

b

Cylinder self diagnostics ensuring safe operation.

c

End of cylinder life status.

d

Cylinder run time in hours.

7

Full cylinder indication and pre-notification of automatic shutdown at end of
cylinder life.

8

Automatic pulse feature to clean any obstruction from the drain solenoid valve
when needed.

9

Automatic off-season shut-down (after 3 days of ‘no call’) will completely drain
the cylinder(s) and automatically restart on call for humidity. Adjustable on/off
and time sequence. Provides extended cylinder life, while ensuring stagnant
water does not remain in the system.

10 Accepts a signal from BMS/BAS system or modulating humidistat.
11 Single or dual channel signal acceptance.
12 Isolated plumbing and electrical compartment with cabinet made of 18-gauge
powder coat paint finish and 20 gauge plumbing electrical door. Modular
plumbing and electrical fully assembled and pre-wired (no field assembly
required).
13 Removable door (no special tools required) to allow user full front access of
plumbing and electrical sections.
14 Plumbing door interlock safety switch to allow power interruption when
installing or servicing the humidifier.
15 Standard of acceptance NORTEC NHTC Series.
16 C-UL_US listed.
17 Spec
(2) Humidifier Controls (NHTC and NHTC Outdoor)
(a) Total Controller microprocessor with the following features or functions:
1

Full function user interface with touch type keypad and backlit alphanumeric
graphic display with trend log.

2

Real time clock indicating date and time with battery back up.

3

Built-in controller with adjustable set point, proportional range, and integral for
use with humidity transducers.

4

Acceptance of industry standard (analogue continuous control demand
signal [0-5 VDC] [1-5] [0-10 VDC] [0-20 mA] [4-20 mA]) relative humidity
transducers.

5

Keypad programming to configure, monitor and control humidifier parameters
on graphic backlit display
a

Relative humidity set point and actual conditions in space from humidity
transducer.

b

Relative humidity set point and actual conditions in duct for variable air
volume (VAV) applications from humidity transducer.

c

Relative humidity high limit set point and actual from humidity transducer.

d

System demand in lbs/hr (kg/hr).

e

On screen service history with date stamp.

f

On screen fault history with troubleshooting list and date stamped.

g

On screen attention indication.

h

Security loop status open/close.

i

Control Channel 1 demand %.

j

Control Channel 2 demand %.

k

Control mode (single or dual modulation).

l

Control type (demand or rh proportional, rh proportional + integral).

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m

Manual capacity output adjustment range of 20-100%.

n

Humidifier model, capacity, software version.

o

Cylinder model # and capacity rating.

p

Humidifier run time weighted hours.

q

Date and time (year, month, day, hour and minute).

r

Stand by heating to increase steam production response time.

s

Rapid modulation capability reduces response time upon start-up.

t

Short cycling detection and correction diagnostics.

u

Foam detection and correction capability.

v

Scroll through start-up and troubleshooting checklist on graphical display.

w

Self-diagnostics during start-up to system test to prevent unsafe operation
of the unit(s).

x

User adjustable drain/flush frequency.
HUMIDIFIER CONTROLS NHPC

(b) Proportional Controller microprocessor with following features or functions:
1

Graphic function display with user interface with touch type key pad.

2

Acceptance of industry standard [analogue continuous control demand signal
[0-1Vdc] [1-5Vdc] [0-10 Vdc] [2-10 Vdc] [0-16 Vdc] [0-20 mA]

3

Keypad/Display to monitor and control humidifier parameters.
a

System demand in lbs/hr (kg/hr).

b

Security loop status open/close.

c

Control Channel 1 demand %.

d

Manual capacity output adjustment range of 20-100%.

e

Self-diagnostics during start-up to system test to prevent undase
operation of the Unit[s].

f

Control signal type.

g

Software version.

(c)
1

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Internal communications via Modbus RTU protocol provides monitoring and
control allowing humidifier(s) to communicate to Building Management
System (BMS). Supporting a RS485 port with a configuration of 9600bps,
8-bits, no parity, one stop bit shall support the following variables:
a

Change Cylinder – Indicates cylinder needs to be replaced (read).

b

Channel 1 Input – Humidifier input value being supplied to channel 0100% (read/write).

c

Channel 1 Set point – Control channel 1 setpoint for relative humidity in
space 0-100% (read/write).

d

Channel 2 Input – Humidifier input value being supplied to channel 0100% (read/write).

e

Channel 2 Set point – Control channel 2 setpoint for relative humidity in
space 0-100% (read/write).

f

System Demand – Indicates humidifier system demand based on input
signal calculations 0-100% (read).

g

Demand/rh_Configuration Parameter – Configures humidifier to accept
demand or %rh signal(s) (read/write).

h

Remote fault Indication – System fault indication and alarm status (read).

i

Network Sensors – Allows network-enabled sensing or control (read/write).

j

Remote Disable – Provides remote humidifier enable/disable system
control. (read/write).

k

Remote Service Indication – Provides remote humidifier service
indication (read).

l

Remote Status Indication – Provides remote humidifier on/standby
system status indication (read).

(3) Remote Monitoring And Control Options (NHTC and NHTC OUTDOOR only)
Reference: Section 15900 - Building Controls and Automation
(a) NORTEC OnLine web based monitoring and control from any location with Internet
access, using standard Internet Explorer, version 6.0 or newer.
(b) NORTEC OnLine remote monitoring hardware using secure  or  or 
or  Internet communication protocols.
(c) NORTEC OnLine Monitoring Service (NOMeS) with weekly humidifier examination
by factory direct technicians for first year, renewable/extendable up three
consecutive years.
(d) One additional year (third year), extended humidifier warranty when renewed/
extended for third year of NORTEC OnLine Monitoring Service (NOMeS).
(e) Packaged accessory, factory installed and ready for customer supplied 
or  communication connection.
(f)

Package will include the listed items in either paragraph (f) 1 through 17 or
paragraph (g) 1 through 7:
1

Internet accessible graphical representation of humidifier performance.

2

Remotely enable/disable humidifier.

3

Remotely adjust rh% set point(s), if equipped.

4

Remotely adjust ‘limited capacity’.

5

Automated e-mail advisories for scheduled service or abnormal conditions.

6

Up to three customer e-mail addresses available for automated e-mail
advisories.

7

Up to 50 incidents, of factory direct support and follow-up per humidifier.

8

First year of remote access includes factory direct monitoring.

9

Weekly checks by NORTEC OnLine factory technicians.

10 Remote factory diagnostics and programming capability.

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11 Individual account access to www.norteconline.com.
12 Monitor up to seventy parameters from each humidifier.
13 Access to service history.
14 Option to add up to  or  ‘slave’ humidifiers to each
NORTEC OnLine module.
15 Monitor up to  or  with one  or 
connection.
16 Up to three years of coverage can be purchased at time of order, extending
humidifier limited warranty to three years.
17 Communication using secure 256-bit Internet connectivity (SSL) and Jabber
protocol.
(g) NORTEC Links remote building management system capability using BACnet
MSTP, BACnet /IP LonTalk, or Johnson N2 networks for monitoring and
controlling. The package will include:
1

Variable definitions, addresses, and values.

2

For complete function capabilities refer to 1.B.(2)(a)6.

3

Monitor up to 13 humidifiers (one master, 12 slaves) using a single interface.

4

External Interface File (XIF) for LonWorks integration.

5

Protocol Implementation Conformance Statement (PICS) for BACnet
integration.

6

BACnet Interoperability Building Blocks (BIBBS) for BACnet Services.

7

User graphic with trending charts, complete with all humidifier details. Refer to
1.B.(2)(a)6.

(4) Humidifier Dispersion Options
(a) Single Tube(s) Steam Dispersion with condensate drain – NORTEC Model(s)
ASD, BSD, CSD
1

Allows for direct introduction of steam into a duct system or air handling unit.
Distributor tube is made of stainless steel and can be installed in a horizontal,
upflow, or downflow duct applications.

2

Steam inlet connection size is f" (22.2 mm) O.D for ASD, BSD models and
1¾" (44.5 mm) for CSD model.

3

Rated capacities per single dispersion tube(s) model - ASD up to 25 lbs/hr,
BSD up to 35 lbs/hr and CSD up to 115 lbs/hr.

4

All single tube(s) distributors have an integral condensate return, allows for
condensate produced at the distributor to be drained through a d" (9.5 mm)
drain leg either back to the humidifier or to a convenient floor drain.

(b) Wall Mounted Direct Steam Dispersion System – NORTEC Model(s) RMBP or
BOBP (for NHTC and NHPC only)
1

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Packaged unit, wall mounted allows for direct space/room humidification when
steam introduction into a ducted system is not feasible.

2

The factory assembled blower pack includes an integral steam distributor,
three tubeaxial (box) fans, fusing, wall mounting bracket, and air proving
safety circuitry.

3

Primary and control voltage terminal blocks facilitate field connections
between the humidifier.

4

Blower pack may be remote mount or built-on the humidifier.

(c) Short Absorption Manifold – NORTEC Model SAM-e
1

Short Absorption Manifold designed for atmospheric steam humidifiers or
pressurized steam from a boiler, to directly inject the steam into ducted air for
humidification.
a

Absorption distance characteristic shall prevent water accumulation on
any induct surfaces beyond ___in. (___mm) downstream of the steam
dispersion panel.

b

Steam dispersion panel consisting of a (one) horizontal stainless steel
header supplying steam to a bank of closely spaced 3" (7.6 cm) or
6" (15.2 cm) or 9" (22.9 cm) or 12" (30.5 cm) vertical tubes, as necessary
to meet absorption distance requirements, and to reduce condensation
losses.

c

Single horizontal stainless steel header to provide steam to vertical
distributor tubes and to reduce condensation losses. Dual header
systems creating unnecessary condensation, or systems needing to be
installed on a partition or requiring blank off plates are not acceptable.

d

Header design is primarily round tube to minimize pressure drop. Square
headers are not acceptable.

e

Steam inlet and condensate return located on the same side and at the
bottom of the header to allow single point entry and floor mounting.

f

Headers and tubes are 304 stainless steel construction.

g

Vertical stainless steel distribution tubes to promote condensate
evacuation. Horizontal distributor tubes are not accepted.

h

Distribution tubes shall include threaded standoffs for trouble free
attachment to factory supplied support bracket.

i

Stainless steel nozzle inserts ensure condensate free steam is
discharged from the center of the distribution tubes. Systems without
nozzle inserts, or other than stainless steel, are not acceptable.

j

Stainless steel nozzle inserts shall have metered orifices, sized to provide
even distribution of the discharged steam, spaced for optimum steam
absorption.

k

Nozzles of dissimilar metals are likely to dislodge due to inconsistent
rates of expansion and therefore not accepted.

l

Adjustable mounting frame available for quick and easy installation.

C. EXECUTION
(1) Examination
(a) Examine ducts, air handling units, and conditions for compliance with requirements
for installation tolerances and other conditions affecting performance.

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(b) Examine roughing-in for piping systems to verify actual locations of piping
connections before humidifier installation.
(c) Proceed with installation only after unsatisfactory conditions have been corrected.
(2) Installation
(a) Install humidifiers and steam dispersion panels per manufacturers’ instructions.
(b) Seal humidifier dispersion-tube duct penetrations with flange.
(c) Install with required clearance for service and maintenance.
(3) Commissioning
(a) System verification testing is part of the commissioning process. Verification
testing shall be performed by the contractor and witnessed and documented by the
commissioning authority. Refer to section 01810, Commissioning, for system
verification tests and commissioning requirements; or
(b) Manufacturer's Field Service: Engage a factory-authorized service representative
to inspect field-assembled components and equipment installation, including
piping and electrical connections. Report results in writing. Responsibilities
include:
1

Leak Test: After installation, charge system and test for leaks. Repair leaks
and retest until no leaks exist.

2

Operational Test: After electrical circuitry has been energized, start units to
confirm proper unit operation. Remove malfunctioning units, replace with new
units, and retest.

3

Test and adjust controls and safeties. Replace damaged and malfunctioning
controls and equipment.

(4) Testing
(a) System testing is accomplished through either of the following methods:
1

System verification testing is part of the commissioning process. Verification
testing shall be performed by the contractor and witnessed and documented
by the commissioning authority. Refer to section 01810, Commissioning, for
system verification tests and commissioning requirements; or

2

Manufacturer’s Field Service: Engage a factory-authorized service
representative to inspect field-assembled components and equipment
installation, including piping and electrical connections. Report results in
writing. Responsibilities include:
a

Leak Test: After installation, charge system and test for leaks. Repair
leaks and retest until no leaks exist.

b

Operational Test: After electrical circuitry has been energized, start units
to confirm proper unit operation. Remove malfunctioning units, replace
with new units, and retest.

c

Test and adjust controls and safeties. Replace damaged and
malfunctioning controls and equipment.

(5) Training
(a) Equipment training can be accomplished in one of the following two ways:

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1

Training of the owner’s operation and maintenance personnel is required in
co-operation with the commissioning authority. Provide competent, factory
authorized personnel to provide instruction to operation and maintenance
personnel concerning the location, operation, and troubleshooting of the
installed systems. The instruction shall be scheduled in coordination with the
commissioning authority after submission and approval of formal training
plans. Refer to System Demonstrations, section 01670, for contractor training
requirements. Refer to section 01810, Commissioning, for further contractor
training requirements; or

2

Engage a factory-authorized service representative to train owner’s
maintenance personnel to adjust, operate, and maintain humidifiers.
a

Train owner’s maintenance personnel on procedures and schedules for
starting and stopping, troubleshooting, servicing, and maintaining
equipment and schedules.

b

Review data in maintenance manuals. Refer to Division 1 Section
Contract Closeout.

c

Review data in maintenance manuals. Refer to Division 1 Section
Operation and Maintenance Data.

d

Schedule training with owner, through architect, with at least seven days
advance notice.

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10-30
SUBMITTALS

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1. SUBMITTAL DESCRIPTIONS
A. INTRODUCTION
(1)

The information found in this section is general in nature and consists of part
numbers, product descriptions and options, dimensions, specifications and
equipment features.

B. NH UNIT
(1)

The different wiring connections to the humidifier unit can be found in Figure 2. All
wiring is to be in accordance with existing national and local electrical codes.

(2)

Performance data for single and double units can be found in Figure 3, Figure 4,
and Figure 5.

(3)

NH Series unit options and common accessories universal are found in Tables 1
and 2.

C. DISTRIBUTORS
(1)

A description of the accessories for the steam distributor can be found in Table 3.

(2)

Dimensions for the steam distributor are found in Figure 6, Figure 7, Figure 8.

D. SAM-e
(1)

This section identifies the dimensions for the various configurations and
components that make up a SAM-e installation.

(2)

General dimensions for the SAM-e and Mini SAM-e are found in Figures 9 and 10.

(3)

For an in-duct/AHU installation without mounting frame refer to Figure 11.

(4)

For an in-duct/AHU installation with mounting frame refer to Figure 12.

(5)

For an outside duct installation without mounting frame refer to Figure 13.

(6)

For an outside duct installation with mounting frame refer to Figure 14.

(7)

For a vertical duct installation refer to Figure 15.

(8)

For outside duct mounting cover plates refer to Figure 16.

(9)

For atmospheric SAM-e adapter dimensions refer to Figure 17.

(10) For atmospheric steam header and adapter configuration refer to Figure 18.
E. BLOWER PACK
(1)

Remote Blower Packs
(a) Remote blower packs are powered from the NH humidifier from a primary
voltage terminal block provided and fed from the leaving side of the unit
contactor to operate blower pack in conjunction with unit operation. A matching
terminal block is incorporated in the blower pack. Field wiring is required

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between the NH unit and remote blower pack terminal blocks or can be
powered by a seperate 12 ov supply.
(b) Disk thermostat mounted on the top of steam distributor will start the fan when
steam is generated and will allow to cool down the blower pack when there is
no call for humidity.
(c) A minimum of two (2) 050-100 RMBP’s are required with the NH-150 or NH200 units. It is recommended that four (4) RMBP’s be used to reduce the steam
absorption distances.
(d) It is recommended that a minimum of two (2) remote blower packs be used on
NH 075-100 units to reduce the steam absorption distances.
(e) For recommended ceiling and frontal clearances, see Chapter 10-10.
(f) For blower pack dimensions refer to Figure 19, Figure 20, Figure 21.
(2)

Built-On Blower Pack (NHTC and NHPC only)
(a) Built-on blower packs are factory mounted and wired to operate in conjunction
with the humidifier. Factory installed and wired manual reset thermostat will not
allow humidifier operation if blower pack becomes overheated.
(b) Built-on blower packs are not available on NH 150-200. Remote blower packs
can be used with these units, multiple blower packs are required on NH 150200.
(c) Built-ON Blower Pack, Wall Mounted Direct Steam Distribution System. Allows
for direct space/room humidification when steam introduction into a ducted
system is not feasible. The factory assembled Built-On Blower Pack includes
an integral steam distributor, three direct drive fans for quiet operation, fan
adjustable louvers for installation flexibility, fusing and safety circuitry with fan
airflow rate at a total of 330 cfm.
(d) It is recommended that a minimum of two (2) remote blower packs be used on
NH 075-100 units to reduce the steam absorption distances.
(e) For recommended ceiling and frontal clearances, see Chapter 10-10. Note
minimum frontal clearance is 36" (91 cm).
(f) For blower pack dimensions refer to Figure 19, Figure 20, and Figure 21.

F. CONTROLS
(1)

NHTC/NHPC humidifiers can be easily modified to accept a control signal from a
modulating humidity controller as supplied by others. Controller must have a builtin adjustable %rh set point. Signal from controller must increase with a drop in
sensed %rh below set point. Humidifier will respond by controlling unit output
between 0% and 100% of rated capacity to match changes in load requirements.

(2)

Double circuit humidifiers (NH 150-200) will require two external controllers by
others to enable each circuit to operate independently of the other. Alternatively,

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coupled circuits can be specified. Coupled circuits will enable the two circuits to be
operated from one controller without compromising the safety features of the
humidifier (order Part No.146-9000).
(3)

The humidifier shall be controlled directly using a humidity sensor (transducer)
supplied by others. The sensor will be field wired to the humidifier for a direct
control at the humidifier. The same sensor(s) can be shared in parallel to a Building
Automation System for monitoring purposes. Allows keypad setpoint of rh and
display of actual sensed rh on the NHTC’s graphical display.

(4)

Double circuit humidifiers (NHTC 150-200) will require two external sensors by
others to enable each circuit to operate independently of the other. Alternatively,
coupled circuits can be specified. Coupled circuits will enable the two circuits to be
operated from one sensor without compromising the safety features of the NHTC
humidifier (order Part No.146-9000).

(5)

All controls are available from the factory as options. If controls were not ordered
with the humidifier, they may be purchased/supplied by others. The following
information is relevant to all controls, factory supplied or otherwise.

(6)

A, B and C are to be wired in series (only one path for current) across terminals 1
and 2 on the low voltage control terminal strip, or replaced with a jumper wire for
constant operation.
(a) The Control On/Off Humidistat is wired to make on drop in humidity, break on
rise. Set to desired %rh.
(b) The High Limit On/Off Humidistat is wired to make on drop in humidity, break
on rise. Set to a higher set point (max. 85%rh) as a safety to prevent
saturation.
(c) The Air Proving On/Off Switch is wired to make when sensing air flow, break
when no air flow. As a safety to prevent saturation when no air flow.

(7)

The factory offers various versions of A, B and C to suit each application. In
general, A is essential, whereas B and C are highly recommended.

(8)

Field wiring from humidistat to humidifier and between devices should be 18 AWG
or heavier.

(9)

The low voltage control terminal strip is provided in the electrical compartment. The
internal side is factory wired. The external side is to be field wired, unless the
external controls have been cabinet mounted at the factory.

(10) Each unit is supplied with a wiring diagram adhered to the inside face of the
cabinet door.

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Figure 1. Low Voltage Control Terminal Strip

(11)

A and B: Mount any wall humidistat (control or high limit) over a standard electrical box
at a height similar to a typical thermostat. Any wall humidistat should be in a location
representative of the overall space being humidified and not in the path of a blower pack
or an air supply grille.

(12)

A: Mount any duct control humidistat in a location representative of the overall air
humidity, usually the return duct. Do not mount it directly in front of the steam distributor
or in a turbulent or mixing zone. Mount it where the air’s humidity and temperature are
uniform and representative air is over-humidified or approaching saturation.

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Figure 2. Primary (Line) Voltage Wiring to Unit

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Figure 3. Physical Data – NHTC/NHPC 005-030

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Figure 4. Physical Data – NHTC/NHPC 050-100

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Figure 5. Physical Data – NHTC/NHPC 150-200

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Unit Model
Distributor Model
No. of Cylinders
No. of Outlets/Cylinder
OD of Cylinder Outlet (NHTC,P,B)
OD of Cylinder Outlet (NHSC/DI)

NH 005-020
ASD
1
1
f"
1¾"

NH 030
BSD
1
1
f"
1¾"

NH 045-100
CSD
1
1
f"
1¾"

Dimensions – in.(mm)
Distributor
Model
ASD 12
ASD18
ASD 24
ASD 30
ASD 36
ASD 42
ASD 48
ASD 54
ASD 60
ASD 66

A

B

L

2 (51)
2 (51)
2.25 (57)
2.25 (57)
2.25 (57)
2.5 (64)
2.5 (64)
2.5 (64)
3 (76)
3 (76)

1.75 (44)
1.75 (44)
1.75 (44)
1.75 (44)
1.75 (44)
2 (51)
2 (51)
2 (51)
2.5 (64)
2.5 (64)

10 (254)
16 (406)
20 (508)
26 (660)
32 (813)
38 (965)
44 (1118)
50 (1270)
56 (1422)
62 (1575)

NH 135-200
CSD
2
2
1¾"
1¾"

Minimum Duct
Length –
in. (mm)
D
12 (305)
18 (457)
24 (609)
30 (762)
36 (914)
42 (1066)
48 (1219)
54 (1371)
60 (1524)
66 (1676)

Figure 6. Distributor Dimensions (Sheet 1 of 3)

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Distributor
Model
BSD 12
BSD 18
BSD 24
BSD 30
BSD 36
BSD 42
BSD 48
BSD 54
BSD 60
BSD 66
BSD 72
BSD 78
BSD 84
BSD 90
BSD 96
BSD 102

A
2 (51)
2 (51)
2.25 (57)
2.25 (57)
2.25 (57)
2.5 (64)
2.5 (64)
2.5 (64)
3 (76)
3 (76)
3 (76)
4 (102)
4 (102)
4 (102)
4 (102)
4 (102)

Dimensions – in (mm)
B
1.75 (44)
1.75 (44)
1.75 (44)
1.75 (44)
1.75 (44)
2 (51)
2 (51)
2 (51)
2.5 (64)
2.5 (64)
2.5 (64)
3.5 (89)
3.5 (89)
3.5 (89)
3.5 (89)
3.5 (89)

C
10 (254)
16 (406)
20 (508)
26 (660)
32 (813)
38 (965)
44 (1118)
50 (1270)
56 (1422)
62 (1575)
68 (1727)
47 (1880)
80 (2032)
86 (2184)
92 (2337)
98 (2489)

NOTES:
1. ASD Maximum rated output 25 lbs/hr (11.4 kg/hr).
2. BSD Maximum rated output 35 lbs/hr (15.9 kg/hr).
3. CSD Maximum rated output 115 lbs/hr (52.3 kg/hr).
4. Steam Distributors tube made of stainless steel.
5. Steam inlet and end cap made of fine rated plastic.
6. Distributor is adjustable for horizontal or downflow application.

Figure 7. Distributor Dimensions (Sheet 2 of 3)

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Minimum Duct
Length – in. (mm)
12 (305)
18 (457)
24 (609)
30 (762)
36 (914)
42 (1066)
48 (1219)
54 (1371)
60 (1524)
66 (1676)
72 (1828)
78 (1981)
84 (2133)
90 (2286)
96 (2438)
102 (2590)

Distributor
Model
CSD 24
CSD 30
CSD 36
CSD 42
CSD 48
CSD 54
CSD 60
CSD 66
CSD 72
CSD 78
CSD 84
CSD 90
CSD 96
CSD 102
CSD 108
CSD 114
CSD 120
CSD 126
CSD 132
CSD 138
CSD 144

A
1.75 (44)
2 (51)
2 (51)
2.25 (57)
2.25 (57)
2.25 (57)
2.5 (64)
2.5 (64)
2.5 (64)
3 (76)
3 (76)
4 (102)
4 (102)
4 (102)
4 (102)
5 (127)
5 (127)
5 (127)
6 (152)
6 (152)
6 (152)

Dimensions – in (mm)
B
C
1.55 (39)
20 (508)
2 (51)
26 (406)
2 (51)
32 (508)
2 (51)
38 (660)
2 (51)
44 (813)
2 (51)
50 (965)
2.5 (64)
56 (1118)
2.5 (64)
62 (1270)
2.5 (64)
68 (1422)
2.5 (64)
74 (1575)
2.5 (64)
80 (1727)
3 (76)
86 (1880)
3 (76)
92 (2032)
3 (76)
98 (2184)
3 (76)
104 (2337)
4.5 (114)
110 (2489)
4.5 (114)
116 (2945)
4.5 (114)
122 (3097)
5.5 (140)
128 (3249)
5.5 (140)
134 (3401)
5.5 (140)
140 (3553)

Minimum Duct
Length – in. (mm)
24 (305)
30 (457)
36 (609)
42 (762)
48 (914)
54(1066)
60 (1219)
66 (1371)
72 (1524)
78 (1676)
84 (1828)
90 (1981)
96 (2133)
102 (2286)
108 (2438)
114 (2590)
120 (3046)
126 (3198)
132 (3350)
138 (3502)
144 (3654)

Figure 8. Distributor Dimensions (Sheet 3 of 3)

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Duct Width
in
cm
18
24
30
36
42
48
54
60
66
72
78
84
90
96
102
108
114
120
126
132
138
144

45.7
61.0
76.2
91.4
106.7
121.9
137.2
152.4
167.6
182.9
198.1
213.4
228.6
243.8
259.1
274.3
289.6
304.8
320.0
335.3
350.5
365.8

A
in
13 1/8
19 1/8
25 1/8
31 1/8
37 1T/8
43 1/8
49 1/8
55 1/8
61 1/8
67 1/8
73 1/8
79 1/8
85 1/8
91 1/8
97 1/8
103 1/8
109 1/8
115 1/8
121 1/8
127 1/8
133 1/8
139 1/8

B
cm
33.3
48.6
63.8
79.1
94.3
109.5
124.8
140.0
155.3
170.5
185.7
201.0
216.2
231.5
246.7
261.9
277.2
292.4
307.7
322.9
338.1
353.4

in
14 7/8
20 7/8
26 7/8
32 7/8
38 7/8
44 7/8
50 7/8
56 7/8
62 7/8
68 7/8
74 7/8
80 7/8
86 7/8
92 7/8
98 7/8
104 7/8
110 7/8
116 7/8
122 7/8
128 7/8
134 7/8
140 7/8

C
cm
37.8
53.0
68.3
83.5
98.7
114.0
129.2
144.5
159.7
174.9
190.2
205.4
220.7
235.9
251.1
266.4
281.6
296.9
312.1
327.3
342.6
357.8

in
16 1/4
22 1/4
28 1/4
34 1/4
40 1/4
46 1/4
52 1/4
58 1/4
64 1/4
70 1/4
76 1/4
82 1/4
88 1/4
94 1/4
100 1/4
106 1/4
112 1/4
118 1/4
124 1/4
130 1/4
136 1/4
142 1/4

cm
41.3
56.5
71.8
87.0
102.2
117.5
132.7
148.0
163.2
178.4
193.7
208.9
224.2
239.4
254.6
269.9
285.1
300.4
315.6
330.8
346.1
361.3

Duct Height
in
cm
18
24
30
36
42
48
54
60
66
72
78
84
90
96
102
108
114
120
126
132
138
144

45.7
61.0
76.2
91.4
106.7
121.9
137.2
152.4
167.6
182.9
198.1
213.4
228.6
243.8
259.1
274.3
289.6
304.8
320.0
335.3
350.5
365.8

D (Tube Height)
in
cm
6.25
12.25
18.25
24.25
30.25
36.25
42.25
48.25
54.25
60.25
66.25
72.25
78.25
84.25
90.25
96.25
102.25
108.25
114.25
120.25
126.25
132.25

Figure 9. SAM-e General Dimensions

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15.9
31.1
46.4
61.6
76.8
92.1
107.3
122.6
137.8
153.0
168.3
183.5
198.8
214.0
229.2
244.5
259.7
275.0
290.2
305.4
320.7
335.9

E min.
in
17.063
23.063
29.063
35.063
41.063
47.063
53.063
59.063
65.063
71.063
77.063
83.063
89.063
95.063
101.063
107.063
113.063
119.063
125.063
131.063
137.063
143.063

cm
43.3
58.6
73.8
89.1
104.3
119.5
134.8
150.0
165.3
180.5
195.7
211.0
226.2
241.5
256.7
271.9
287.2
302.4
317.7
332.9
348.1
363.4

E max.
in
cm
24.604
30.604
36.604
42.604
48.604
54.604
60.604
66.604
72.604
78.604
84.604
90.604
96.604
102.604
108.604
114.604
120.604
126.604
132.604
138.604
144.604
150.604

62.5
77.7
93.0
108.2
123.5
138.7
153.9
169.2
184.4
199.7
214.9
230.1
245.4
260.6
275.9
291.1
306.3
321.6
336.8
352.1
367.3
382.5

Duct Width
in
cm
12
30.5
18
45.7
24
61.0

A
in
11 1/16
17 1/16
23 1/16

cm
28.1
43.3
58.6

Duct Height
in
cm
8
20.3
10
25.4
12
30.5
14
35.6
16
40.6
18
45.7
20
50.8
22
55.9
24
61.0

B
in
7 7/8
9 7/8
11 7/8
13 7/8
15 7/8
17 7/8
19 7/8
21 7/8
23 7/8

C
cm
20.0
25.1
30.2
35.2
40.3
45.4
50.5
55.6
60.6

in
4 7/16
6 7/16
8 7/16
10 7/16
12 7/16
14 7/16
16 7/16
18 7/16
20 7/16

cm
11.3
16.4
21.4
26.5
31.6
36.7
41.8
46.8
51.9

Figure 10. General Mini SAM-e Dimensions

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Figure 11. In-Duct / AHU Installation Without Mounting Frame Installation

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Figure 12. In-Duct / AHU Installation With Mounting Frame Installation

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Figure 13. Outside Duct Installation Without Mounting Frame Installation

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Figure 13. In-Duct / AHU Installation With Mounting Frame Installation

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Figure 14. Vertical Duct Installation

Figure 15. Outside Duct Mounting Cover Plates

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Figure 16. Atmospheric SAM-e Adapter Dimensions

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Figure 17. Atmospheric Steam Header and Adapter Configuration

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Figure 18. Physical Data for Remote Mounted Blower Pack

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Figure 19. Physical Data Units with Optional Built-On Blower Packs

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Figure 20. Physical Data Units with Optional Built-On Blower Packs

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A
in.
4.4

B
cm
12.2

in.
2.9

Wall Digital Humidistat Dimensions
C
D
E
cm
in.
cm
in.
cm
in.
cm
7.2
1.2
3.0
0.6
1.6
1.7
4.3

Figure 21. Wall Digital Humidistat

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F
in.
1.7

cm
4.3

A
in.
3.5

B
cm
8.9

in.
7.9

cm
20.0

Duct Sensor Dimensions
C
D
in.
cm
in.
cm
1.7
4.2
4.4
11.2

E
in.
3.9

F
cm
9.6

in.
3.5

cm
8.9

Figure 22. Duct Sensor

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2. SUBMITTALS
A. INTRODUCTION
(1) The following pages are intended to be used by the engineer to determine the
component quantities required.
B. INSTALLATION COMPONENT SELECTION
(1) The following Tables 1 through 15 will enable the engineer to select components for
this installation.
Table 1. NH Series Unit Options
Part No.

Description

2522160

FILLCUP EXTENSION KIT NHTC/NHPC - 2 Required for 150 or 200

2522162

DRAIN WATER COOLER
005-020, to temper drain water below 120°F (49°C)

2522163

DRAIN WATER COOLER
030, to temper drain water below 120°F (49°C)

2522164

DRAIN WATER COOLER
050-075, to temper drain water below 120°F (49°C)

2522165

DRAIN WATER COOLER
100, to temper drain water below 120°F (49°C)

2522166

DRAIN WATER COOLER
150, to temper drain water below 120°F (49°C)

2522167

DRAIN WATER COOLER
200, to temper drain water below 120°F (49°C)

2522168

FOAM DETECTION NHTC HARDWARE

2522169

FOAM DETECTION NHPC HARDWARE

2522170

REMOTE FAULT INDICATION NHTC/NHPC

1469535

HIGH HUMIDITY ALARM PACKAGE
ON/OFF high limit duct stat w/indicator

1469536

LOW HUMIDITY ALARM PACKAGE
ON/OFF low limit duct stat w/indicator

1469537

HIGH HUMIDITY ALARM PACKAGE
ON/OFF high limit wall stat w/indicator

1469538

LOW HUMIDITY ALARM PACKAGE
ON/OFF low limit wall stat w/indicator

2522172

FACTORY PROVIDED EXTERNAL DRAIN AIR-GAP - REDUCER

146-9000

COUPLED CIRCUIT FOR DOUBLE UNIT

2522800

KEEPWARM, ALLOWING WATER TEMPERATURE IN THE CYLINDER TO
BE MAINTAINED AT 160°F (70°) FOR QUICK RESPONSE UPON A CALL
FOR HUMIDITY. NHTC OPTION ONLY.

2522803

UNIT NETWORKING NHTC AND NHTC OUTDOOR UP TO 1600 LBS/HR
ONE PACKAGE REQUIRED FOR EACH ADDITIONAL SLAVE HUMIDIFIER
DOUBLE UNIT 150/200 COUNTS AS 2 PACKAGES

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Qty

Table 2. Common Accessories Universal
Part No.

Description

1458807

DOUBLE CHECK VALVE FOR WATER INLET LINE

1429527

DRAIN WATER SUMP PUMP (HIGH TEMPERATURE)

1329505

IN-LINE WATER FILTER
5 micron filter

1469595

POCKET HYGRO-THERMOMETER DIGITAL DISPLAY

1329561

REPLACEMENT WATER FILTERS
1 micron

1329506

REPLACEMENT WATER FILTERS
5 micron

Qty

Table 3. Steam Distributors
Part No.

Description

1506165

DISTRIBUTOR SST ASD 12

1506166

DISTRIBUTOR SST ASD 18

1506167

DISTRIBUTOR SST ASD 24

1506168

DISTRIBUTOR SST ASD 30

1506169

DISTRIBUTOR SST ASD 36

1506170

DISTRIBUTOR SST ASD 42

1506171

DISTRIBUTOR SST ASD 48

1506172

DISTRIBUTOR SST ASD 54

1506173

DISTRIBUTOR SST ASD 60

1506174

DISTRIBUTOR SST ASD 66

1506175

DISTRIBUTOR SST BSD 12

1506176

DISTRIBUTOR SST BSD 18

1506177

DISTRIBUTOR SST BSD 24

1506178

DISTRIBUTOR SST BSD 30

1506179

DISTRIBUTOR SST BSD 36

1506180

DISTRIBUTOR SST BSD 42

1506181

DISTRIBUTOR SST BSD 48

1506182

DISTRIBUTOR SST BSD 54

1506183

DISTRIBUTOR SST BSD 60

1506184

DISTRIBUTOR SST BSD 66

1506185

DISTRIBUTOR SST BSD 72

1506186

DISTRIBUTOR SST BSD 78

1506187

DISTRIBUTOR SST BSD 84

1506188

DISTRIBUTOR SST BSD 90

1506189

DISTRIBUTOR SST BSD 96

Qty

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Table 3. Steam Distributors (cont)
Part No.

Description

1506190

DISTRIBUTOR SST BSD 102

1506191

DISTRIBUTOR SST CSD 24

1506192

DISTRIBUTOR SST CSD 30

1506193

DISTRIBUTOR SST CSD 36

1506194

DISTRIBUTOR SST CSD 42

1506195

DISTRIBUTOR SST CSD 48

1506196

DISTRIBUTOR SST CSD 54

1506197

DISTRIBUTOR SST CSD 60

1506198

DISTRIBUTOR SST CSD 66

1506199

DISTRIBUTOR SST CSD 72

1506200

DISTRIBUTOR SST CSD 78

1506201

DISTRIBUTOR SST CSD 84

1506202

DISTRIBUTOR SST CSD 90

1506203

DISTRIBUTOR SST CSD 96

1506204

DISTRIBUTOR SST CSD 102

1506205

DISTRIBUTOR SST CSD 108

1506206

DISTRIBUTOR SST CSD 114

1506207

DISTRIBUTOR SST CSD 120

1506208

DISTRIBUTOR SST CSD 126

1506209

DISTRIBUTOR SST CSD 132

1506210

DISTRIBUTOR SST CSD 138

1506211

DISTRIBUTOR SST CSD 144

Qty

Table 4. Steam Distributor Accessories
Part No.

Description
Large Size Steam Distribution Accessories (>33 lb/hr)

1329633

STEAM SUPPLY LINE TEE
1e" x 1e" x 1e" OD

1329664

LARGE STEAM SUPPLY HEADER 1 INTO 3
1e" OD connections

1859602

SPLITTING MANIFOLD 1 INTO 2
1½" to f" x f" OD

1859603

SPLITTING MANIFOLD 1 INTO 3
1e" to f" x f" x f" OD

1329643

BALANCING VALVE MANUAL FOR 1e" LINE

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Qty

Table 4. Steam Distributor Accessories (cont)
Part No.

Description

Qty

Small Size Steam Distribution Accessories (<33 lb/hr)
1329642

BALANCING VALVE MANUAL TYPE FOR f" LINE

1329663

SMALL STEAM SUPPLY HEADER 1 INTO 3
f" x f" x f" x f"

1329662

STEAM SUPPLY LINE TEE
f" x f" x f" OD

1328810

INSULATED FLEXIBLE STEAM SUPPLY HOSE
Actual f" ID fits with ASD and BSD type steam distributors, used with models
030 and smaller humidifiers.

Feet

NOTE
It is recommended that all runs of steam piping be run in hard
copper with ½" thick foam insulation and that flexible steam
hose always be used to make a flexible coupling to the
steam distributor and the cylinder steam outlet.
1328820

INSULATED FLEXIBLE STEAM SUPPLY HOSE
Actual 1¾" ID fits with CSD type steam distributors, used with models 050 to
200 humidifiers.

Feet

NOTE
It is recommended that all runs of steam piping be run in hard
copper with ½" thick foam insulation and that flexible steam
hose always be used to make a flexible coupling to the
steam distributor and the cylinder steam outlet.
1328840

CONDENSATE RETURN HOSE
Rubber, d" ID, fits over d" OD copper tube condensate leg on all steam
distributors, factory supplied/installed with built on blower packs. Copper can be
used for condensate lines provided that condensate hose always be used to
make a flexible coupling to the steam distributor.

1329634

SMALL STEAM SUPPLY HOSE CONDENSATE TRAP TEE
f" x f" x d" OD, must be used at low points in steam supply hose to prevent
condensate build-up that would result in blockage, or to remove excessive
condensate can be routed to fill cup if humidifier is below trap, or to any floor
drain.

1329635

LARGE STEAM SUPPLY HOSE CONDENSATE TRAP TEE
1e" x 1e" x d" OD, must be used at low points in steam supply hose to prevent
condensate build-up that would result in steam blockage, or to remove
excessive condensate due to long steam lines, condensate can be routed to fill
cup for recycling if humidifier is below trap, or to any floor drain.

Feet

Other Accessories
1507846

STEAM LINE REDUCER
1¾" to f" Copper

1508165

STEAM LINE REDUCER
1¾" to f" Stainless Steel

10-30
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Table 5. SAM-e Header
Part No.

Description

1503269

3" CENTERS, 18" (45.7 cm) WIDE
3 Steam tubes

1503270

3" CENTERS, 24" (61.0 cm) WIDE
5 Steam tubes

1503271

3" CENTERS, 30" (76.2 cm) WIDE
7 Steam tubes

1503272

3" CENTERS, 36" (91.4 cm) WIDE
9 Steam tubes

1503273

3" CENTERS, 42" (106.7 cm) WIDE
11 Steam tubes

1503274

3" CENTERS, 48" (121.9 cm) WIDE
13 Steam tubes

1503275

3" CENTERS, 54" (137.2 cm) WIDE
15 Steam tubes

1503276

3" CENTERS, 60" (152.4 cm) WIDE
17 Steam tubes

1503277

3" CENTERS, 66" (167.6 cm) WIDE
19 Steam tubes

1503278

3" CENTERS, 72" (182.9 cm) WIDE
21 Steam tubes

1503279

3" CENTERS, 78" (198.1 cm) WIDE
23 Steam tubes

1503280

3" CENTERS, 84" (213.4 cm) WIDE
25 Steam tubes

1503281

3" CENTERS, 90" (228.6 cm) WIDE
27 Steam tubes

1503282

3" CENTERS, 96" (243.8 cm) WIDE
29 Steam tubes

1503283

3" CENTERS, 102" (259.1 cm) WIDE
31 Steam tubes

1503284

3" CENTERS, 108" (274.3 cm) WIDE
33 Steam tubes

1503285

3" CENTERS, 114" (289.6 cm) WIDE
35 Steam tubes

1503286

3" CENTERS, 120" (304.8 cm) WIDE
37 Steam tubes

1503287

3" CENTERS, 126" (320.0 cm) WIDE
39 Steam tubes

1503288

3" CENTERS, 132" (335.3 cm) WIDE
41 Steam tubes

1503289

3" CENTERS, 138" (350.5 cm) WIDE
43 Steam tubes

10-30
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2008-10-01

Qty

Table 5. SAM-e Header (cont)
Part No.
1503290
–––

Description

Qty

3" CENTERS, 144" (365.8 cm) WIDE
45 Steam tubes
3" CENTERS, 144+" (365.8+ cm) WIDE
Consult factory

1503309

6" CENTERS, 18" (45.7 cm) WIDE
2 Steam tubes

1503310

6" CENTERS, 24" (61.0 cm) WIDE
3 Steam tubes

1503331

6" CENTERS, 30" (76.2 cm) WIDE
4 Steam tubes

1503312

6" CENTERS, 36" (91.4 cm) WIDE
5 Steam tubes

1503313

6" CENTERS, 42" (106.7 cm) WIDE
6 Steam tubes

1503314

6" CENTERS, 48" (121.9 cm) WIDE
7 Steam tubes

1503315

6" CENTERS, 54" (137.2 cm) WIDE
8 Steam tubes

1503316

6" CENTERS, 60" (152.4 cm) WIDE
9 Steam tubes

1503317

6" CENTERS, 66" (167.6 cm) WIDE
10 Steam tubes

1503318

6" CENTERS, 72" (182.9 cm) WIDE
11 Steam tubes

1503319

3" CENTERS, 78" (198.1 cm) WIDE
12 Steam tubes

1503320

6" CENTERS, 84" (213.4 cm) WIDE
13 Steam tubes

1503321

6" CENTERS, 90" (228.6 cm) WIDE
14 Steam tubes

1503322

6" CENTERS, 96" (243.8 cm) WIDE
15 Steam tubes

1503323

6" CENTERS, 102" (259.1 cm) WIDE
16 Steam tubes

1503324

6" CENTERS, 108" (274.3 cm) WIDE
17 Steam tubes

1503325

6" CENTERS, 114" (289.6 cm) WIDE
18 Steam tubes

1503326

6" CENTERS, 120" (304.8 cm) WIDE
19 Steam tubes

1503327

6" CENTERS, 126" (320.0 cm) WIDE
20 Steam tubes

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Table 5. SAM-e Header (cont)
Part No.

Description

1503328

6" CENTERS, 132" (335.3 cm) WIDE
21 Steam tubes

1503329

6" CENTERS, 138" (350.5 cm) WIDE
22 Steam tubes

1503330

6" CENTERS, 144" (365.8 cm) WIDE
23 Steam tubes

–––

6" CENTERS, 144+" (365.8+ cm) WIDE
Consult factory

1506789

9" CENTERS, 36" (91.4 cm) WIDE
3 Steam tubes

1506790

9" CENTERS, 48" (121.9 cm) WIDE
5 Steam tubes

1506791

9" CENTERS, 60" (152.4 cm) WIDE
7 Steam tubes

1506792

9" CENTERS, 72" (182.9 cm) WIDE
9 Steam tubes

1506794

9" CENTERS, 84" (213.4 cm) WIDE
11 Steam tubes

1506795

9" CENTERS, 96" (243.8 cm) WIDE
13 Steam tubes

1506796

9" CENTERS, 108" (274.3 cm) WIDE
15 Steam tubes

1507729

9" CENTERS, 120" (304.8 cm) WIDE
17 Steam tubes

1507730

9" CENTERS, 132" (335.3 cm) WIDE
19 Steam tubes

1507731

9" CENTERS, 144" (365.8 cm) WIDE
21 Steam tubes

–––

9" CENTERS, 144+" (365.8+ cm) WIDE
Consult factory

1506797

12" CENTERS, 36" (91.4 cm) WIDE
3 Steam tubes

1506798

12" CENTERS, 48" (121.9 cm) WIDE
4 Steam tubes

1506799

12" CENTERS, 60" (152.4 cm) WIDE
5 Steam tubes

1506800

12" CENTERS, 72" (182.9 cm) WIDE
6 Steam tubes

1506801

12" CENTERS, 84" (213.4 cm) WIDE
7 Steam tubes

1506802

12" CENTERS, 96" (243.8 cm) WIDE
8 Steam tubes

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Qty

Table 5. SAM-e Header (cont)
Part No.

Description

1506803

12" CENTERS, 108" (274.3 cm) WIDE
9 Steam tubes

1506804

12" CENTERS, 120" (304.8 cm) WIDE
10 Steam tubes

1506805

12" CENTERS, 132" (335.3 cm) WIDE
11 Steam tubes

1506806

12" CENTERS, 144" (365.8 cm) WIDE
12 Steam tubes

–––

Qty

12" CENTERS, 144+" (365.8+ cm) WIDE
Consult factory

Table 6. Adjustable Mounting Frame for SAM-e
Part No.

Description

1504697

MOUNTING FRAME
SAM-e 9" to 15"

1503469

MOUNTING FRAME
SAM-e 16" to 27"

1503470

MOUNTING FRAME
SAM-e 28" to 51"

1503471

MOUNTING FRAME
SAM-e 52" to 99"

Qty

Table 7. SAM-e Tube Matrix
Part No.

Description

1503388

TYPE A, 18" (45.7 cm) WIDE
15 lbs/hr (7 kg/hr)

1503389

TYPE A, 24" (61.0 cm) WIDE
15 lbs/hr (7 kg/hr)

1503390

TYPE A, 30" (76.2 cm) WIDE
15 lbs/hr (7 kg/hr)

1503391

TYPE A, 36" (91.4 cm) WIDE
15 lbs/hr (7 kg/hr)

1503392

TYPE A, 42" (106.7 cm) WIDE
15 lbs/hr (7 kg/hr)

1506393

TYPE A, 48" (121.9 cm) WIDE
15 lbs/hr (7 kg/hr)

1503394

TYPE A, 54" (137.2 cm) WIDE
15 lbs/hr (7 kg/hr)

1503395

TYPE A, 60" (152.4 cm) WIDE
15 lbs/hr (7 kg/hr)

Qty

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Table 7. SAM-e Tube Matrix (cont)
Part No.

Description

1503396

TYPE A, 66" (167.6 cm) WIDE
15 lbs/hr (7 kg/hr)

1503397

TYPE A, 72" (182.9 cm) WIDE
15 lbs/hr (7 kg/hr)

1503398

TYPE A, 78" (198.1 cm) WIDE
15 lbs/hr (7 kg/hr)

1503399

TYPE A, 84" (213.4 cm) WIDE
15 lbs/hr (7 kg/hr)

1503400

TYPE A, 90" (228.6 cm) WIDE
15 lbs/hr (7 kg/hr)

1503401

TYPE A, 96" (243.8 cm) WIDE
15 lbs/hr (7 kg/hr)

1503402

TYPE A, 102" (259.1 cm) WIDE
15 lbs/hr (7 kg/hr)

1503403

TYPE A, 108" (274.3 cm) WIDE
15 lbs/hr (7 kg/hr)

1503404

TYPE A, 114" (289.6 cm) WIDE
15 lbs/hr (7 kg/hr)

1503405

TYPE A, 120" (304.8 cm) WIDE
15 lbs/hr (7 kg/hr)

1503406

TYPE A, 126" (320.0 cm) WIDE
15 lbs/hr (7 kg/hr)

1503407

TYPE A, 132" (335.3 cm) WIDE
15 lbs/hr (7 kg/hr)

1503408

TYPE A, 138" (350.5 cm) WIDE
15 lbs/hr (7 kg/hr)

1503409

TYPE A, 144" (365.8 cm) WIDE
15 lbs/hr (7 kg/hr)

1503411

TYPE B, 24" (61.0 cm) WIDE
35 lbs/hr (16 kg/hr)

1503412

TYPE B, 30" (76.2 cm) WIDE
35 lbs/hr (16 kg/hr)

1503413

TYPE B, 36" (91.4 cm) WIDE
35 lbs/hr (16 kg/hr)

1503414

TYPE B, 42" (106.7 cm) WIDE
35 lbs/hr (16 kg/hr)

1506415

TYPE B, 48" (121.9 cm) WIDE
35 lbs/hr (16 kg/hr)

1503416

TYPE B, 54" (137.2 cm) WIDE
35 lbs/hr (16 kg/hr)

1503417

TYPE B, 60" (152.4 cm) WIDE
35 lbs/hr (16 kg/hr)

10-30
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Qty

Table 7. SAM-e Tube Matrix (cont)
Part No.

Description

1503418

TYPE B, 66" (167.6 cm) WIDE
35 lbs/hr (16 kg/hr)

1503419

TYPE B, 72" (182.9 cm) WIDE
35 lbs/hr (16 kg/hr)

1503420

TYPE B, 78" (198.1 cm) WIDE
35 lbs/hr (16 kg/hr)

1503421

TYPE B, 84" (213.4 cm) WIDE
35 lbs/hr (16 kg/hr)

1503422

TYPE B, 90" (228.6 cm) WIDE
35 lbs/hr (16 kg/hr)

1503423

TYPE B, 96" (243.8 cm) WIDE
35 lbs/hr (16 kg/hr)

1503424

TYPE B, 102" (259.1 cm) WIDE
35 lbs/hr (16 kg/hr)

1503425

TYPE B, 108" (274.3 cm) WIDE
35 lbs/hr (16 kg/hr)

1503426

TYPE B, 114" (289.6 cm) WIDE
35 lbs/hr (16 kg/hr)

1503427

TYPE B, 120" (304.8 cm) WIDE
35 lbs/hr (16 kg/hr)

1503428

TYPE B, 126" (320.0 cm) WIDE
35 lbs/hr (16 kg/hr)

1503429

TYPE B, 132" (335.3 cm) WIDE
35 lbs/hr (16 kg/hr)

1503430

TYPE B, 138" (350.5 cm) WIDE
35 lbs/hr (16 kg/hr)

1503431

TYPE B, 144" (365.8 cm) WIDE
35 lbs/hr (16 kg/hr)

1509391

TYPE B+, 30" (76.2 cm) WIDE
55 lbs/hr (25 kg/hr)

1509392

TYPE B+, 36" (91.4 cm) WIDE
55 lbs/hr (25 kg/hr)

1509393

TYPE B+, 42" (106.7 cm) WIDE
55 lbs/hr (25 kg/hr)

1509394

TYPE B+, 48" (121.9 cm) WIDE
55 lbs/hr (25 kg/hr)

1509395

TYPE B+, 54" (137.2 cm) WIDE
55 lbs/hr (25 kg/hr)

1509396

TYPE B+, 60" (152.4 cm) WIDE
55 lbs/hr (25 kg/hr)

1509397

TYPE B+, 66" (167.6 cm) WIDE
55 lbs/hr (25 kg/hr)

Qty

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Table 7. SAM-e Tube Matrix (cont)
Part No.

Description

1509398

TYPE B+, 72" (182.9 cm) WIDE
55 lbs/hr (25 kg/hr)

1509399

TYPE B+, 78" (198.1 cm) WIDE
55 lbs/hr (25 kg/hr)

1509400

TYPE B+, 84" (213.4 cm) WIDE
55 lbs/hr (25 kg/hr)

1509401

TYPE B+, 90" (228.6 cm) WIDE
55 lbs/hr (25 kg/hr)

1509402

TYPE B+, 96" (243.8 cm) WIDE
55 lbs/hr (25 kg/hr)

1509403

TYPE B+, 102" (259.1 cm) WIDE
55 lbs/hr (25 kg/hr)

1509404

TYPE B+, 108" (274.3 cm) WIDE
55 lbs/hr (25 kg/hr)

1509405

TYPE B+, 114" (289.6 cm) WIDE
55 lbs/hr (25 kg/hr)

1509406

TYPE B+, 120" (304.8 cm) WIDE
55 lbs/hr (25 kg/hr)

1509407

TYPE B+, 126" (320.0 cm) WIDE
55 lbs/hr (25 kg/hr)

1509408

TYPE B+, 132" (335.3 cm) WIDE
55 lbs/hr (25 kg/hr)

1509409

TYPE B+, 138" (350.5 cm) WIDE
55 lbs/hr (25 kg/hr)

1509410

TYPE B+, 144" (365.8 cm) WIDE
55 lbs/hr (25 kg/hr)

1503440

TYPE C, 36" (91.4 cm) WIDE
75 lbs/hr (34 kg/hr)

1503441

TYPE C, 42" (106.7 cm) WIDE
75 lbs/hr (34 kg/hr)

1503442

TYPE C, 48" (121.9 cm) WIDE
75 lbs/hr (34 kg/hr)

1503443

TYPE C, 54" (137.2 cm) WIDE
75 lbs/hr (34 kg/hr)

1503444

TYPE C, 60" (152.4 cm) WIDE
75 lbs/hr (34 kg/hr)

1503445

TYPE C, 66" (167.6 cm) WIDE
75 lbs/hr (34 kg/hr)

1503446

TYPE C, 72" (182.9 cm) WIDE
75 lbs/hr (34 kg/hr)

1503447

TYPE C, 78" (198.1 cm) WIDE
75 lbs/hr (34 kg/hr)

10-30
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Qty

Table 7. SAM-e Tube Matrix (cont)
Part No.

Description

1503448

TYPE C, 84" (213.4 cm) WIDE
75 lbs/hr (34 kg/hr)

1503449

TYPE C, 90" (228.6 cm) WIDE
75 lbs/hr (34 kg/hr)

1503450

TYPE C, 96" (243.8 cm) WIDE
75 lbs/hr (34 kg/hr)

1503451

TYPE C, 102" (259.1 cm) WIDE
75 lbs/hr (34 kg/hr)

1503452

TYPE C, 108" (274.3 cm) WIDE
75 lbs/hr (34 kg/hr)

1503453

TYPE C, 114" (289.6 cm) WIDE
75 lbs/hr (34 kg/hr)

1503454

TYPE C, 120" (304.8 cm) WIDE
75 lbs/hr (34 kg/hr)

1503455

TYPE C, 126" (320.0 cm) WIDE
75 lbs/hr (34 kg/hr)

1503456

TYPE C, 132" (335.3 cm) WIDE
75 lbs/hr (34 kg/hr)

1503457

TYPE C, 138" (350.5 cm) WIDE
75 lbs/hr (34 kg/hr)

1503458

TYPE C, 144" (365.8 cm) WIDE
75 lbs/hr (34 kg/hr)

Qty

NOTE: Add 6" (15.2 cm) to in-duct height for outside-duct mounting of header.

Table 8. SAM-e Inlet and Adapter Configurations
Part No.

Description

1503479

Inlet Adapter Kit 1, SAM-e, 100 lbs/hr 1.75"

1503480

Inlet Adapter Kit 2, SAM-e, 200 lbs/hr 2x1.75"

1503481

Inlet Adapter Kit 3, SAM-e, 300 lbs/hr 3x1.75"

1503482

Inlet Adapter Kit 4, SAM-e, 400 lbs/hr 4x1.75"

1503483

Inlet Adapter Kit 5, SAM-e, 500 lbs/hr 5x1.75"

1503484

Inlet Adapter Kit 6, SAM-e, 600 lbs/hr 6x1.75"

1503485

Inlet Adapter Kit 7, SAM-e, 700 lbs/hr 7x1.75"

1503486

Inlet Adapter Kit 8, SAM-e, 800 lbs/hr 8x1.75"

Qty

NOTES: 1. Inlet/Adapter: Allows direct connection of the humidifier steam outlets to the SAM-e. Therefore, there is no
adapter located at the humidifier.
2. Consult SAM-e Shop Drawings for more details.
3. All adapters come complete with hose/clamp connections for all outlets.
4. All electrode humidifiers must run individual steam lines directly to SAM-e.

10-30
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2008-10-01

Table 9. Remote Blower Pack
Part No.

Description

Qty

2530893

Remote Blower Pack 5 - 30 lbs/hr

110-120V

2530891

Remote Blower Pack 5 - 30 lbs/hr

208V

2530889

Remote Blower Pack 5 - 30 lbs/hr

220-240V

2530892

Remote Blower Pack 5 - 30 lbs/hr

277V

2530888

Remote Blower Pack 5 - 30 lbs/hr

380V

2530887

Remote Blower Pack 5 - 30 lbs/hr

440-480V

2530886

Remote Blower Pack 5 - 30 lbs/hr

550-600V

2530900

Remote Blower Pack 50 - 100 lbs/hr

110-120V

2530898

Remote Blower Pack 50 - 100 lbs/hr

208V

2530897

Remote Blower Pack 50 - 100 lbs/hr

220-240V

2530899

Remote Blower Pack 50 - 100 lbs/hr

277V

2530896

Remote Blower Pack 50 - 100 lbs/hr

380V

2530895

Remote Blower Pack 50 - 100 lbs/hr

440-480V

2530894

Remote Blower Pack 50 - 100 lbs/hr

550-600V

Table 10. Built-On Blower Pack
Part No.

Description

Qty

2522142

Built-on Blower Pack, NHTC/NHPC 005

2522143

Built-on Blower Pack, NHTC/NHPC 010-030

208V

2522144

Built-on Blower Pack, NHTC/NHPC 010-030

220-240V

2522145

Built-on Blower Pack, NHTC/NHPC 010-030

277V

2522147

Built-on Blower Pack, NHTC/NHPC 010-030

380V

2522148

Built-on Blower Pack, NHTC/NHPC 010-030

440-480V

2522149

Built-on Blower Pack, NHTC/NHPC 010-030

550-600V

2524849

Built-on Blower Pack, NHTC/NHPC 050-100

208V

2524850

Built-on Blower Pack, NHTC/NHPC 050-100

220-240V

2524851

Built-on Blower Pack, NHTC/NHPC 050-100

277V

2524852

Built-on Blower Pack, NHTC/NHPC 050-100

308V

2524853

Built-on Blower Pack, NHTC/NHPC 050-100

440-480V

2524854

Built-on Blower Pack, NHTC/NHPC 050-100

550-600V

10-30
Page 111
2008-10-01

120V

Table 11. Controls – ON/OFF
Part No.
2520259

2520273

Description

Qty

DIGITAL HUMIDISTAT WALL MOUNTED ON/OFF
On/off wall mounted humidistat applicable as control humidistat or high limit
10% to 90% RH range with 5% non-adjustable differential.

Control

DIGITAL HUMIDISTAT DUCT MOUNTED ON/OFF PACKAGE
On/off duct mounted humidistat, applicable as a control humidistat or high limit,
15% to 90% RH range with 4% non-adjustable differential.

Control

132-9109

PRESSURE ELECTRIC SWITCH
On/off, remote mounted, 3 to 20 PSIG range, factory set to 13 PSIG with 2 to
6 PSIG fully adjustable differential, factory set to 3 PSIG. For use with
pneumatic humidistat (by others).

132-9203

AIR PROVING
On/off duct mounted, pressure differential switch, 0.07 IWC to 12.0 IWC fully
adjustable operating range, good for positive, negative or differential pressure
applications, stops humidifier if no differential pressure is sensed.

146-9000

COUPLED CIRCUITS
Factory internally wired in parallel to enable control of double circuit unit from
one set of external controls. Applies to NHTC 150 and 200 models only.

____

High Limit ____
____

High Limit ____

NOTE: NORTEC NH Series humidifiers must have a closed circuit across terminals 8 and 10. NORTEC highly
recommends the use of a high limit humidistat and air proving switch in series for this function.

Table 12. Modulating Control By NORTEC
Part No.
2520266

2520261

1510142

Description

Qty

DIGITAL WALL CONTROLLER WITH DUCT SENSOR PACKAGE
This is a digital LCD setpoint controller with a duct mounted humidity sensor
used for modulating high limit or control.

Control

DIGITAL WALL CONTROLLER WITHOUT INTEGRAL SENSOR
This is a digital LCD setpoint controller to be used with one or all of the
following remote sensors: remote wall sensor, remote duct sensor and outdoor
duct mounted temperature sensor.

Control

DIGITAL WALL CONTROLLER WITH INTEGRAL SENSOR
This is a digital LCD setpoint controller with a wall mounted humidity sensor
used for humidity control in the space.

Control

2520263

OUTDOOR DUCT MOUNT TEMPERATURE SET BACK
This sensor can be mounted directly onto the fresh air intake of the ventilation
duct. The humidistat controller reads the outdoor temperature and resets the
humidity control setpoint to prevent condensation in windows or building
structures. Use with modulating controllers above.

1509857

REMOTE DUCT SENSOR
This humidity sensor can be mounted directly onto the return ventilation as the
main controlling sensor. It can also be used as a supply high limit sensor. It
must be used in conjunction with any other controller for remote sensing.

1509858

REMOTE WALL SENSOR
This humidity sensor can be mounted on a wall as the main controlling sensor.
It must be used in conjunction with any other controller for remote sensing.

____

High Limit ____
____

High Limit ____
____

High Limit ____

10-30
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Table 13. Modulating Demand Signal By Others Single Channel
Part No.

Description

2523060

0 - 5 Vdc single channel Demand signal acceptance

2523062

0 - 20 mA single channel Demand signal acceptance

2523064

4 - 20 mA single channel Demand signal acceptance

2523066

0 - 10 Vdc single channel Demand signal acceptance

2523090

0 - 16 Vdc single channel Demand signal acceptance

2523092

1 - 5 Vdc single channel Demand signal acceptance

2523094

2 - 10 Vdc single channel Demand signal acceptance

2523096

0 - 20 Vdc single channel Demand signal acceptance

Qty

Table 14. Modulating Demand Signal By Others Dual Channel
Part No.

Description

2523061

0 - 5 Vdc dual channel Demand signal acceptance

2526063

0 - 20 mA dual channel Demand signal acceptance

2523065

4 - 20 mA dual channel Demand signal acceptance

2523089

0 - 10 Vdc dual channel Demand signal acceptance

2523091

0 - 16 Vdc dual channel Demand signal acceptance

2523093

1 - 5 Vdc dual channel Demand signal acceptance

2523095

2 - 10 Vdc dual channel Demand signal acceptance

2523097

0 - 20 Vdc dual channel Demand signal acceptance

Qty

NOTE: : NHPC does not accept dual signal control
Table 15. Modulation By Others: Transducer Signal (NHTC AND NHTC OUTDOOR ONLY)
Part No.

Description

2523100

0 - 5 Vdc single channel Transducer singal acceptance

2523101

0 - 5Vdc dual channel Transducer singal acceptance

2523102

0 - 20 mA single channel Transducer signal acceptance

2523104

0 - 20 mA dual channel Transducer signal acceptance

2523105

4 - 20 mA single channel Transducer signal acceptance

2523107

4 - 20 mA dual channel Transducer signal acceptance

2523110

0 - 10 Vdc single channel Transducer signal acceptance

2523111

0 - 10 Vdc dual channel Transducer signal acceptance

2523112

0 - 16 Vdc single channel Transducer signal acceptance

2523113

0 - 16 Vdc dual channel Transducer signal acceptance

2523114

1 - 5 Vdc single channel Transducer signal acceptance

2523115

1 - 5 Vdc dual channel Transducer signal acceptance

2523116

2 - 10 Vdc single channel Transducer signal acceptance

10-30
Page 113
2008-10-01

Qty

2523117

2 - 10 Vdc dual channel Transducer signal acceptance

2523118

0 - 20 Vdc single channel Transducer signal acceptance

2523119

0 - 20 Vdc dual channel Transducer signal acceptance

Table 16. NORTEC OnLine Options (NHTC only)
Part No.

Description

1509780

NORTEC ONLINE
Static IP Option for NHTC

1509781

NORTEC ONLINE
DHCP Option for NHTC

1509782

NORTEC ONLINE
GPRS Option for NHTC

1509783

NORTEC ONLINE
Dial-Up Option for NHTC

1509784

NORTEC ONLINE
Slave Option for NHTC

Qty

Table 17. NORTEC Links Options (NHTC only)
Part No.

Description

2525534

NORTEC LINKS 2 FOR NHTC
BACnet/IP

2527106

NORTEC LINKS 2 FOR NHTC
BACnet/MSTP

2527108

NORTEC LINKS 2 FOR NHTC
Johnson N2

2527107

NORTEC LINKS 2 FOR NHTC
LonWorks

2522194

NORTEC LINKS 2 FOR NHTC
Slave

Qty

NOTES:: NHTC Total Controller has the Modbus communication built into the PCB Processor for
remote monitoring and control using only BAS/BMS support Modbus
Table 18. NH Series Fusing Options
Part No.

Description

2522468

FUSING NHTC/PC 020-030/208-240/3

2522470

FUSING NHTC/PC 005-020/120-277/1

2522471

FUSING NHTC/PC 010-020/380-600/1

2522472

FUSING NHTC/PC 020-030/440-600/3

2522474

FUSING NHTC/PC 050-075/208-240/3

2522475

FUSING NHTC/PC 050-075/40-600/3

2522476

FUSING NHTC/PC 100/208-240/3

2522477

FUSING NHTC/PC 100/440-480/3

Qty

10-30
Page 114
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2522478

FUSING NHTC/PC 100/550-600/3

2522479

FUSING NHTC/PC 150/208-240/3

2522480

FUSING NHTC/PC 150/440-600/3

2522481

FUSING NHTC/PC 200/208-240/3

2522482

FUSING NHTC/PC 200/440-480/3

2522483

FUSING NHTC/NHPC 200/550-600/3

C. SCHEDULE

Humidifier Information
Zone Label ___________ Zone Load ___________ Humidifier Output ______ External Protection _____
Humidifier Label _______ Humidifier Model _______ Voltage/Phase (VAC) ___ Requirement (A) _______

Control Information
Demand
By Nortec

On/Off

By Others

By Nortec

Transducer

By Others

By Nortec

By Others

Space Control
High Limit
Air Proving

By Nortec

By Others

None (Blower Pack)

Distributor Information

G

G

G

Blower Pack

Built On

Duct Information

Width ___________

Distributor

ASD/BSD/CSD? _______ SAM-e
No. Of Distributors _____ Header Length ________ No. of Tubes _________
Types of Tubs _________ Length ______________
Length ________

10-30
Page 115
2008-10-01

Remote Mounted

Length ___________

None (Duct)
Vertical Airflow

G

WARRANTY
(1) Walter Meier Inc. and/or Walter Meier Ltd. (hereinafter collectively referred to as THE
COMPANY), warrant for a period of two years after installation or 30 months from
manufacturer’s ship date, whichever date is earlier, that THE COMPANY’s
manufactured and assembled products, not otherwise expressly warranted (with the
exception of the cylinder), are free from defects in material and workmanship. No
warranty is made against corrosion, deterioration, or suitability of substituted materials
used as a result of compliance with government regulations.
(2) THE COMPANY’s obligations and liabilities under this warranty are limited to furnishing
replacement parts to the customer, F.O.B. THE COMPANY’s factory, providing the
defective part(s) is returned freight prepaid by the customer. Parts used for repairs are
warranted for the balance of the term of the warranty on the original humidifier or
90 days, whichever is longer.
(3) The warranties set forth herein are in lieu of all other warranties expressed or implied
by law. No liability whatsoever shall be attached to THE COMPANY until said products
have been paid for in full and then said liability shall be limited to the original purchase
price for the product. Any further warranty must be in writing, signed by an officer of
THE COMPANY.
(4) THE COMPANY’s limited warranty on accessories, not of the companies manufacture,
such as controls, humidistats, pumps, etc. is limited to the warranty of the original
equipment manufacturer from date of original shipment of humidifier.
(5) THE COMPANY makes no warranty and assumes no liability unless the equipment is
installed in strict accordance with a copy of the catalog and installation manual in effect
at the date of purchase and by a contractor approved by THE COMPANY to install
such equipment.
(6) THE COMPANY makes no warranty and assumes no liability whatsoever for
consequential damage or damage resulting directly from misapplication, incorrect
sizing or lack of proper maintenance of the equipment.
(7) THE COMPANY makes no warranty and assumes no liability whatsoever for damage
resulting from freezing of the humidifier, supply lines, drain lines, or steam distribution
systems.
(8) THE COMPANY makes no warranty and assumes no liability whatsoever for
equipment that has failed due to ambient conditions when installed in locations having
climates below 14°F (-10°C) during January or above 104°F (40°C) during July. (See
Table 1: Weather Design Data above).
(9) THE COMPANY retains the right to change the design, specification and performance
criteria of its products without notice or obligation.

INSTALLATION DATE (MM/DD/YYYY)

MODEL #
SERIAL #
CYLINDER #

Cylinder Replacement Date (MM/DD/YYYY)

Authorized Agent:
U.S.A.
Walter Meier (Climate USA) Inc.

CANADA
Walter Meier (Climate Canada) Ltd.

826 Proctor Avenue
Ogdensburg, NY 13669
TEL: 1-866-NORTEC-1
EMAIL: northamerica.climate@waltermeier.com
WEBSITE: www.humidity.com

2740 Fenton Road
Ottawa, ON K1T 3T7
TEL: 1-866-NORTEC-1
FAX: (613) 822-7964



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