Greenheck Fan Series L Users Manual

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Centrifugal Roof Exhaust Fans
Series L
Low Silhouette

Louvered Penthouse Style
LDP/LBP

Fabra Hood Style
LD/LB

April

2008

Series L
Centrifugal Roof Exhaust Fans
Greenheck’s Series L, low silhouette, models LD, LB, LDP, and LBP centrifugal roof exhaust fans provide the
industry’s best performance and durability for general clean air applications.
• Broadest performance in the industry, up to 1.25 in. wg (311 Pa) and 37,500 cfm (63,713 m3/hr).
• Performance as cataloged is assured. All fan sizes are tested in our AMCA Accredited Laboratory, and all
models are licensed to bear the AMCA sound and air performance seals.
• UL Listed for electrical.*
• Greenheck subjects these products to extensive life testing, assuring you the fans will provide years of
reliable performance.

Greenheck Fan Corporation certifies the
models LD, LDP, LB, and LBP shown
herein are licensed to bear the AMCA seal.
The ratings shown are based on tests
and procedures performed in accordance
with AMCA Publication 211 and AMCA
Publication 311 and comply with the
requirements of the AMCA Certified
Ratings Program.

* UL is optional and must be specified.
Models LD, LDP, LB, and LBP are
listed for electrical (UL/cUL 705)
File no. E40001.

Leading Edge Technical Support
When you need extensive product or installation and operating manual (IOM)
information, our products are supported by the industry’s best product literature,
electronic media and computer aided product selection (CAPS) program. You’ll
also find this information on our website at www.greenheck.com
You can always count on personal service and expertise from our national and
international representative organization. To locate your nearest Greenheck
representative, call 715-359-6171 or visit our website at www.greenheck.com

Quick Build Programs
Our Quick Build (QB) Program ensures rapid response time when your
needs require a fast turnaround. Select from more than 40 configurations
of the Series L, low silhouette model fan and we will manufacture and ship
them within ten days. We have strategically located many warehouses
across the United States and internationally to fill your request at a
moments notice.

World Class Manufacturing
Greenheck’s skilled production workers use cost-effective machines and unique dies designed and built by our
own engineers to add innovative features and greater strength to our centrifugal roof exhaust fans. Our advanced
manufacturing processes and quality control procedures always ensure the highest product quality. And just to
be sure you get the peace-of-mind you expect when you specify Greenheck, our assembly inspectors test run
and monitor every fan before it leaves the factory. Results of these tests are kept in permanent records for future
reference.
2

Unique Construction Features

Fabra Hood Style

Louvered Penthouse Style

• Hinged Hood - All sizes feature a hood
which may be hinged to provide quick
access to the motor and drive assembly.
Access may be gained by simply removing
two of the four hood fasteners or all
fasteners for complete removal.
• Large Interior Dimensions - All sizes allow
complete accessibility. Interior dimensions
offer clearance for inspection, cleaning, or
maintenance of the motor, wheel, belt(s),
and drives.

• Hinged Cover - All sizes feature an
aluminum cover which may be hinged to
provide quick access to the motor and
drive assembly. Covers are fastened down
with a quick release hood latch.
• Large Interior Dimensions - All sizes allow
complete accessibility from above. Interior
dimensions offer clearance for inspection,
cleaning, or maintenance of the motor,
wheel, belt(s), and drives.
• Strength & Weather Resistant - Each unit
features storm resistant aluminum louver
blades with mitered corners. For decades,
our storm resistant blades have proven
highly effective. Each sturdy extruded
aluminum louver blade has a material
thickness of 0.080 inches.

• Strength & Weather Resistance - The
hood is designed with arched panels
manufactured of heavy gauge, precision roll
formed steel with interlocking edges. Each
interlocking rib creates a tight, weather
resistant seal. Heavy gauge steel support
members provide structural strength. The
first hood was put into service over 30
years ago.

Greenheck’s interlocking rib design combines
four material thicknesses with I-beam design
principles producing a hood far superior
in strength to
conventional
designs (an
important feature
in high wind
and snow load
regions).
Formed channels
adjacent to the ribs provide water drainage to
ensure weather tightness.

Greenheck’s louvered
penthouse hoods feature
heavy gauge extruded
aluminum louvers
with mitered corners
for a clean, finished
appearance and weather
resistant construction.
The interior vertical edge of the curb cap
forms the throat and weathershield. Each
corner is also shielded to prevent leakage.
Penthouses are available in aluminum for
lasting durability and appearance.

Hoods are available in galvanized steel,
painted steel, or aluminum construction.

3

1

6
12

10
5
2

9
15

11
14

13

LB/LD
FABRA HOOD STYLE

8

4

6

10

13

11

7
5

9

3

LBP/LDP
LOUVERED PENTHOUSE STYLE
4

Unique Construction Features
1 FABRA HOOD STYLE - Models LD and LB have
a rib-lock aluminum housing. Hood panels are
interlocked and attached to sturdy aluminum
rails. (Galvanized housings are optional).
2 HINGED ACCESS - The entire hood assembly
on models LD and LB can be hinged open for
access to the internal fan components.
3 LOUVERED PENTHOUSE - Models LDP and
LBP penthouse style housings are constructed
of heavy extruded aluminum louvers with
mitered and welded corners.
4 HOOD COVER - Models LDP and LBP
aluminum hood covers are hinged and
removable for access.
5 DRIVE FRAME - Constructed from heavy
gauge galvanized steel. Belt adjustment is
accomplished by loosening fasteners, sliding
the motor plate, and retightening fasteners.
6 FAN SHAFT - Precisely sized, ground, and
polished so the first critical speed is at least
25% over the maximum operating speed. Close
tolerances between the shaft and bearing result
in longer bearing life.
7 BEARINGS - 100% factory tested and designed
specifically for air handling applications with
a minimum L10 life in excess of 100,000 hours
(L50 average life of 500,000 hours).
8 CURB CAP - Curb cap has prepunched
mounting holes to ensure correct attachment to
the curb.

9

MOTOR - Permanently lubricated, sealed ball
bearing motors are selected to provide years of
trouble-free operation.

10 DRIVE ASSEMBLY - Drives are oversized 150%
of driven horsepower. Machined cast iron
pulleys are factory set to the required RPM and
are adjustable for final system balancing. Belts
are static free and oil resistant.
11 WHEEL - An aluminum, backward inclined,
non-overloading, centrifugal wheel is utilized
to deliver maximum efficiency. Each wheel is
statically and dynamically balanced.
12 VIBRATION ISOLATORS - Support the drive
assembly and wheel without steel to steel
contact providing long life and quiet operation.
13 BIRDSCREEN - Galvanized rigid wire protects
the fan’s discharge from birds or small objects.
(Aluminum birdscreen is optional).
14 WINDBAND - Lower windband assembly
ensures weathertight and rigid unit
construction.
15 DISCONNECT SWITCH - NEMA-1 switch is
factory mounted and wiring is provided from
the motor to the disconnect enclosure as
standard. All wiring and electrical components
comply with the National Electric Codes (NEC)
and are UL Listed or Recognized.
16 CONDUIT CHASE - A large diameter conduit for
installing electrical wiring through the curb cap
into the motor compartment. (Not shown)

STANDARD INSTALLATION
Models LB, LD, LBP, and LDP exhaust fans are designed
to meet the needs of general clean air applications. Tests
have been conducted to ensure safe and reliable fans
capable of withstanding normal exhaust conditions.
When roofing materials extend to the top of the curb,
roof curbs should be 11⁄2 in. (38 mm) (3/4 in. (19 mm)
on a side) less than the unit curb cap to allow for
roofing and flashing.
For recommended duct size, damper size, and
roof opening dimensions, refer to CAPS or the
performance data pages.

8 to 12 in.
(203 to 305 mm)

3/4 in.
(19 mm)

Installation must include a means for inspecting,
cleaning, and servicing the exhaust fan.
Due to the varying airstreams encountered in
commercial ventilation, system designers must
be aware of national, state, and local codes and
guidelines governing these installations. Local code
authorities should be consulted before proceeding
with any ventilation project.

Damper

1 1/4 in.
(32 mm)

Recommended
Duct and
Damper Size

1 1/4 in.
(32 mm)

Recommended
Roof Opening

5

Options and Accessories
BIRDSCREEN - Galvanized mesh is standard.
Optional aluminum or stainless steel rigid wire are
also available.
HOOD INSULATION - Hood insulation is dualdensity to minimize condensation, reduce thermal
transfer, and enhance sound absorption at high and
low frequencies.
LIFTING LUGS - Four heavy gauge steel brackets
are available to provide lifting points when raising
the fan to the roof.
Tie Down Points - Four heavy gauge steel
brackets are available to secure the fan in heavy
wind applications. Cables and anchors by others.
COATINGS - All Greenheck coatings and resistance
charts can be found in the performance coatings
catalog. A wide variety of coatings and colors are
available in two categories:
	 Decorative coatings – Sixteen standard colors
are available.
	 Protective coatings – Five electrostatic applied
powder coatings are available to protect against
most environments.
DAMPERS - Designed to prevent
outside air from entering back
into the building when fan is
off. Options include gravity and
motorized dampers. Damper
sizes are shown on each
performance data page.
CURB SEAL - Rubber seal between fan and curb to
ensure proper sealing when attached to a curb.

6

DISCONNECT SWITCHES - A wide selection
of NEMA rated switches are
available for positive electrical
shutoff and safety, including:
dust-tight, rainproof, and
corrosion-resistant. Switches
may be internally or externally
mounted.
SPEED CONTROLLERS - Available for use with
shaded pole and permanent split capacitor (PSC)
open motors on models LD and LDP fans. They
provide an economical means of system balancing
with direct drive fans.
CURB EXTENSIONS - Extensions raise the fan
discharge above the roof line and provide an
accessible mounting location for dampers. Insect
screen bases
constructed with
a removable
fine mesh are
recommended for
applications where insect
entry must be prevented. Curb
extensions are not available with LDP and LBP
severe duty construction models.
ROOF CURBS - Prefabricated roof curbs reduce
installation time and costs by ensuring compatibility
between the fan, curb, and roof opening. All curbs
are insulated with fiberglass. A
wide variety of roof curbs
are available including
flanged, pitched, and
sound-absorbing.

Severe Duty Option
SEVERE DUTY - Specifically designed for applications with
extremely high structural design load requirements. The severe
duty models LDP and LBP are far superior to any centrifugal roof
exhaust fan currently in the market. Designed with structural steel
supports and ESD-603D louver blades, the severe duty louver
enclosure (SDLE) may be used in any application which requires a
fan to endure high winds with the potential of wind blown debris.
The louvered housing has been tested in accordance with the
following Miami-Dade test protocols:
• Large Missile Impact Test - TAS-201-94
• Uniform Static Air Pressure - TAS-202-94
• Uniform Cyclic Wind Loading - TAS-203-94
To meet the above protocols, the severe duty fan must be mounted
on a severe duty roof curb, which is attached directly to the building
NOTICE OF ACCEPTANCE NUMBER 03-0422.05
structure. Maximum design load is 140 psf.
Available on sizes
• LDP - 60 though 120
• LBP - 10 through 30
Weights and dimensions will vary from standard LDP and LBP construction.

Severe Duty Installation
Models LDP and LBP severe duty exhaust fans are designed to meet the needs of general clean air
applications. Tests have been conducted to ensure safe, rugged and reliable fans capable of withstanding
severe exhaust conditions.
The severe duty roof curb model SD is supplied
with this product and is designed with 12 gauge
welded steel construction. Greenheck
recommends the severe duty curb to be
anchored to the structure of the building.
Dependent upon roofing material it shall be
bolted and welded. For recommended duct
size, refer to CAPS or installation manual.
Installation must include a means for
inspecting, cleaning, and servicing the
exhaust fan.
Due to the varying airstreams encountered
in commercial ventilation, system designers
must be aware of national, state, and local
codes and guidelines governing these
installations. Local code authorities should
be consulted before proceeding with any
ventilation project.

3/4 INCH (19 MM)
THROAT DIMENSION
(ROOF OPENING)

1 3/4 INCH (44 MM)

1 3/4 INCH (44 MM)

OUTSIDE CURB DIMENSION
12, 18 OR 24 INCHES
(305, 457, 610 MM)

1 INCH (25 MM) INSULATION

4 IN.
(102 MM)

ROOF OPENING

4 IN.
(102 MM)

CORRUGATED
ROOF DECK
CONCRETE

ROOF TRUSS
RECOMMENDED
DUCT & DAMPER SIZE
1 1/4 INCH (32 MM)
2 1/2 INCH (64 MM)
4 INCH
(102 MM)

6 INCH x 3 INCH
(152 MM x 76 MM)
STEEL MOUNTING ANGLE
(12 GAUGE MINIMUM)

1 3/4 INCH
(44 MM)

2 1/2 INCH (64 MM)
4 INCH
(102 MM)

7

Severe Duty Dimensions

LDP - SEVERE DUTY DIMENSIONS
B

C

D

E
A

A

LBP - SEVERE DUTY DIMENSIONS
C

B

D

E
A

Model
Number

LDP

60
65
70
75
80
85
90
95
100
120

A

B

A

C

D

E

Damper
Size
(square)

Roof
Opening
(square)

Weight*

17

347⁄8

347⁄8

175⁄8

13⁄4

8

101⁄2

375

(432)

(886)

(886)

(448)

(44)

(203)

(267)

(170)

19

367⁄8

367⁄8

175⁄8

13⁄4

10

121⁄2

400

(483)

(934)

(934)

(448)

(44)

(254)

(318)

(181)

22

397⁄8

397⁄8

195⁄8

13⁄4

12

141⁄2

425

(559)

(1013)

(1013)

(498)

(44)

(305)

(368)

(193)

10

22

397⁄8

503⁄8

181⁄8

13⁄4

12

101⁄2

550

(559)

(1013)

(1280)

(460)

(44)

(305)

(267)

(249)

14

26

437⁄8

517⁄8

181⁄8

13⁄4

16

101⁄2

550

(660)

(1114)

(1318)

(460)

(44)

(406)

(267)

(249)

101⁄2

550

30

477⁄8

577⁄8

245⁄8

13⁄4

18

(267)

(249)

(762)

(1216)

(1470)

(625)

(44)

(457)

10 ⁄2

700

(267)

(318)

18
LBP
21

1

24

34

517⁄8

617⁄8

245⁄8

13⁄4

24

101⁄2

800

(864)

(1318)

(1572)

(625)

(44)

(610)

(267)

(363)

30

40

577⁄8

697⁄8

271⁄4

13⁄4

30

101⁄2

950

(1016)

(1470)

(1775)

(692)

(44)

(762)

(267)

(431)

Cover
Thickness

Louver
Thickness

Curb Cap
Thickness

0.100

0.125

0.25

(0.045)

(0.056)

(0.113)

aluminum

aluminum

steel

0.100

0.125

0.25

(0.045)

(0.056)

(0.113)

aluminum

aluminum

steel

All dimensions are in inches (millimeters). Weight in pounds (kilograms). *Weight shown is the largest cataloged Open Drip Proof motor.

8

Severe Duty Curb
Installation Options
OUTSIDE CURB DIMENSION
THROAT DIMENSION
(ROOF OPENING)

1.75 INCH (44 MM)

1.75 INCH (44 MM)

Concrete
CURB HEIGHT
12, 18, OR 24 INCHES
(305, 457, or 610 MM)

1 INCH (25 MM) INSULATION
HILTI KB11, 3/8-16 X 3 ON
12 INCH (305 MM) MAXIMUM CENTERS.
MINIMUM TWO PER SIDE.

ROOF OPENING
2.5 INCH (57 MM)
EMBEDMENT

MINIMUM CONCRETE
STRENGTH OF 3000 PSI

2.25 INCH (57 MM) TYPICAL

1.75 INCH (44 MM)

4 INCH (102 MM)
MOUNTING FLANGE
TYPICAL

4 INCH (102 MM) TYPICAL
OUTSIDE FLANGE DIMENSION

THROAT DIMENSION AND ROOF OPENING EQUAL OUTSIDE CURB DIMENSION MINUS 3.5 INCHES (89 MM)

OUTSIDE CURB DIMENSION
THROAT DIMENSION
(ROOF OPENING)

1.75 INCH (44 MM)

Steel

CURB HEIGHT
12, 18, OR 24 INCHES
(305, 457, 610 MM)

1.75 INCH (44 MM)

CORNER TOP VIEW

1 INCH (25 MM) INSULATION

HILTI KWIK-FLEX 12-14 SCREW, NO. 3 POINT.
THREE (3) FASTENERS EACH CORNER AND
MAXIMUM OF 4.5 INCHES (114 mm) SPACING;
ADD ADDITIONAL FASTENERS TO SATISFY.

4 INCH (102 MM)
MOUNTING FLANGE
TYPICAL

ROOF OPENING
CORRUGATED
ROOF DECK

6 X 3 INCH (152 x 76 mm)
STEEL MOUNTING ANGLE
(12 GAUGE MINIMUM)

ROOF TRUSS
1.75 INCH (44 MM)

2.25 INCH (57 MM) TYPICAL
4 INCH (102 MM) TYPICAL

OUTSIDE FLANGE DIMENSION

THROAT DIMENSION AND ROOF OPENING EQUAL OUTSIDE CURB DIMENSION MINUS 3.5 INCHES (89 MM)

Model Number Code
The Model number system is designed to completely identify the fan. The correct code letters must be
specified to designate belt or direct drive. The remainder of the model number is determined by the size and
performance selected from the following pages.

LB - 30 - 7
Model
LD - Fabra Hood Direct Drive
LB - Fabra Hood Belt Drive
LDP - Louvered Penthouse Direct Drive
LBP - Louvered Penthouse Belt Drive
Fan Size
LD/LDP 60 thru 120
LB/LBP 10 thru 54

Motor hp (Belt Drive only)
6 = 1/6 10 = 1
50 = 5
75 = 71⁄2
4 = 1/4 15 = 11⁄2
3 = 1/3 20 = 2
100 = 10
5 = 1/2 30 = 3
150 = 15
7 = 3/4
Motor RPM
A = 1725
B = 1140
C = 860

(Direct Drive only)

9

LD/LDP 60-75
Direct Drive
LD Dimensions
131⁄2

(559)

Size 60 and 65
0.6

27

Static Pressure Pa

13

(44)

0.5

120

(330)

13⁄4

RPM
Density 0.075 lb/ft3

140

(686)

(343)

2

17

17

(432)

(432)

(51)

100
80
60
40

Static Pressure in. wg

22

LD

/L

0.3

23

111⁄2

-6

5

/L

DP

-6

0

0.2

0

0.0
0

50

100

150

200

250

300

cfm

23

(584)

DP

LD

0.1

20

LDP Dimensions

0.4

0

(584)

50

100

150

200

250

300

350

400

450

500

3

m /hr

(292)

Size 70 and 75

131⁄2

0.6
RPM
Density 0.075 lb/ft3

140

(343)

0.5

17

17

(432)

(432)

LD 60 thru LD 75 LDP 60 thru LDP 75
Hood Thickness
24 ga
Cover Thickness
0.064 (0.029)
Louver Thickness
0.081 (0.036)
Curb Cap Thickness
0.064 (0.029)
0.064 (0.029)
Damper Size Square
8 (203)
8 (203)
Roof Opening Square
101⁄2 (267)
101⁄2 (267)
Weight*
Galvanized, 37 (17) Aluminum, 49 (22)

100
80
60
40
20
0

Static Pressure in. wg

1 ⁄4
(44)

Static Pressure Pa

120
3

LD

0.4

/L

DP

-7

0

0.3

LD/LDP-60

Motor
HP
1/60

Fan
RPM
1590*

-7

5

0.2

0.1

0.0
0

50

100

150

200

LD/LDP-65

1/30

1680*

70 W

LD/LDP-70

1/30

1665*

73 W

LD/LDP-75

1/25

1620*

79 W

250

300

350

400

cfm
0

100

200

300

400

500

600

3

m /hr

CFM / Static Pressure in Inches wg

Watts
51 W

/L

DP

All dimensions are in inches (millimeters). Weight in pounds (kilograms).
*Weight shown is the largest cataloged Open Drip Proof motor. See page 8 for
severe duty LDP dimensions.

Model
Number

LD

CFM

0

0.1

0.125

0.2

0.25

0.3

202

171

164

139

119

97

0.375

0.4

Sones

4.8

4.3

4.3

4.0

3.8

3.6

CFM

274

245

238

208

187

165

129

112

Sones

5.6

5.3

5.2

5.0

5.1

5.1

5.1

5.2

0.45

0.5

CFM

360

324

314

282

257

231

188

171

132

Sones

6.4

6.0

5.9

5.5

5.4

5.3

5.2

5.1

5.0

CFM

400

360

351

317

290

264

222

206

168

122

Sones

5.8

5.2

5.1

4.9

4.7

4.5

4.2

4.1

4.0

3.8

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

10

LD/LDP 80-95
Direct Drive
LD Dimensions

Size 80 and 85
0.7

27
131⁄2

0.6

(343)
Static Pressure Pa

140

16
(406)

13⁄4
(44)

RPM
Density 0.075 lb/ft3

160

(686)

4

19

19

(483)

(483)

(102)

120
100
80
60

Static Pressure in. wg

28
(711)

0.5

-8

0

LD

/L

DP

-8

5

0.2

0.0
0

100

200

300

400

500

600

cfm

25

(635)

DP

0.3

0.1

0

LDP Dimensions
121⁄2

/L

40
20

25

LD

0.4

0

200

400

600

(635)

800

1000

3

m /hr

(318)

Size 90 and 95

161⁄2

220

0.9

(419)

200

0.8

180

19

(483)

(483)

Hood Thickness
Cover Thickness
Louver Thickness
Curb Cap Thickness
Damper Size Square
Roof Opening Square
Weight*

LD 80 thru LD 95 LDP 80 thru LDP 95
24 ga
0.064 (0.029)
0.081 (0.036)
0.064 (0.029)
0.064 (0.029)
10 (254)
10 (254)
1
12 ⁄2 (318)
121⁄2 (318)
Galvanized, 45 (20) Aluminum, 63 (29)

140
120
100
80
60

0.7

Static Pressure in. wg

(44)

160

19

Static Pressure Pa

1 ⁄4
3

RPM
Density 0.075 lb/ft3

0.6

LD

0.5

/L

DP

LD

0.4

LD/LDP-80

Motor
HP
1/20

Fan
RPM
1550*

-9

0.3

0

0.2
40
0.1

20
0

0.0
0

200

400

600

LD/LDP-85

1/20

1500*

120 W

LD/LDP-90

1/15

1550*

92 W

LD/LDP-95

1/8

1550*

160 W

800

1000

1200

cfm
0

200

400

600

800

1000 1200 1400 1600 1800 2000
3

m /hr

CFM / Static Pressure in Inches wg

Watts
115 W

5

DP

All dimensions are in inches (millimeters). Weight in pounds (kilograms).
*Weight shown is the largest cataloged Open Drip Proof motor. See page 8 for
severe duty LDP dimensions.

Model
Number

-9

/L

CFM

0

0.1

0.125

0.2

0.25

0.3

0.375

0.5

481

426

413

372

342

310

258

165

Sones

8.8

8.2

8.0

7.8

7.6

7.4

7.2

7.5

CFM

576

507

490

440

403

360

291

182

Sones

8.6

8.1

8.0

7.7

7.3

7.1

7.0

7.8

CFM

819

735

714

654

608

562

485

361

0.6

0.625

Sones

8.8

8.6

8.5

8.4

8.3

8.1

7.8

7.9

CFM

1052

965

942

870

825

780

695

552

430

396

Sones

11.8

11.2

11.1

10.8

10.4

10.2

10.0

9.8

10.1

10.2

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

11

LD/LDP 100-120
Direct Drive
LD Dimensions
250

(686)

(44)

22

(559)

(559)

4
(102)

100

50

S YS
TEM

TO
FT
H IS

0.7
0.6

0.4
0.3
0.2
0.1

0

LDP Dimensions

0.0
0

14

(711)

11

40

86

DO

0

NO

200

400

600

800

1000

1200

1400

1600

cfm

28

28

25

LEF

0.5

17

TH
E

22

150

TO

(457)

0.8

SE
LE
CT

Static Pressure Pa

18

Static Pressure in. wg

0.9
200

13⁄4

1.0

(343)

RPM
Density 0.075 lb/ft3

CUR
VE

131⁄2

(762)

Size 100
1.1

27

T

30

0

500

1000

1500

(711)

2000

2500

3

m /hr

(356)

Size 120
1.2

URV
E

181⁄2

100

F TH

TO

0.4

0.2

0

Motor
HP

Fan
RPM

LD/LDP-100-C

1/8

860

LD/LDP-100-B

1/6

1140

LD/LDP-100-A

1/4

1725

LD/LDP-120-C

1/8

860

LD/LDP-120-B

1/6

1140

LD/LDP-120-A

1/4

1725

25

40

0.0
0

86

0

DO

200

400

600

800

1000

1200

1400

1600

1800

2000

cfm
0

500

1000

1500

2000

2500

3000

3

All dimensions are in inches (millimeters). Weight in pounds (kilograms).
*Weight shown is the largest cataloged Open Drip Proof motor. See page 8 for
severe duty LDP dimensions.

Model
Number

17

11

N
OT

50

0.6

L EF

150

0.8

HE

LD 100 thru LD 120 LDP 100 thru LDP 120
Hood Thickness
24 ga
Cover Thickness
0.064 (0.029)
Louver Thickness
0.081 (0.036)
Curb Cap Thickness
0.064 (0.029)
0.064 (0.029)
Damper Size Square
12 (305)
12 (305)
1
Roof Opening Square
14 ⁄2 (368)
141⁄2 (368)
Weight*
Galvanized, 57 (26)
Aluminum, 82 (37)

200

CT
TO
T

22
(559)

RPM
Density 0.075 lb/ft3

SE
LE

22
(559)

1.0

Static Pressure in. wg

13⁄4
(44)

Static Pressure Pa

250

IS S
YST
EM
C

(470)

m /hr

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
766
0.022
6.3
1016
0.051
12.0
1538
0.18
16.2

0.125
568
0.029
5.3
879
0.065
11.0
1457
0.21
14.8

0.2
407
0.028
5.1
780
0.068
10.6
1399
0.22
14.4

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

921
0.03
6.6
1221
0.071
11.9
1848
0.25
21

702
0.041
5.3
1072
0.086
10.9
1762
0.28
19.6

536
0.043
5.1
960
0.094
10.3
1693
0.29
19.4

CFM / Static Pressure in Inches wg
0.25
0.375
0.5
0.625

0.75

0.875

0.9

709
0.068
10.4
1360
0.22
14.2

493
0.066
10.4
1256
0.23
14.3

1142
0.24
14.2

1024
0.24
14.8

891
0.23
15.3

724
0.23
15.9

678
0.22
16.1

886
0.096
10.0
1652
0.29
19.3

664
0.099
9.2
1540
0.31
18.6

1412
0.33
18.4

1286
0.34
18.2

1142
0.35
18.2

979
0.34
18.3

940
0.33
18.3

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

12

LB/LBP 10
Belt Drive
LB Dimensions
17 ⁄4

(711)

1.4

50

SY
ST
EM
OF
TH
IS

LE
FT

0.2

0

LBP Dimensions

T
NO

10

SE

67

83

60

3

0

200

400

600

0

500

800

1000

(978)

1000

1200

1400

1600

1500

2000

2500

3

m /hr

(356)

(432)

22

13⁄4

34

00

cfm

17

325⁄8

(559)

(44)

0.0
0

381⁄2

(711)

15
13

TH

0.4

DO

14

67

E

0.6

(559)

28

17

TO

(85)

100

0.8

T

(559)

22

150

1.0

LE
C

(44)

31⁄4

Static Pressure in. wg

Static Pressure Pa

(432)

22

1.2

(438)

200

RPM
HP
Density 0.075 lb/ft3

p

p

300

250

1 ⁄4

3h

4h

(991)

17

3

1/

1/

39

1

CU
RV
E

28

(829)

LB-10
LBP-10
Hood Thickness
22 ga
Cover Thickness
0.064 (0.029)
Louver Thickness
0.081 (0.036)
Curb Cap Thickness 0.064 (0.029) 0.064 (0.029)
Damper Size Square
12 (305)
12 (305)
Roof Opening Square 141⁄2 (368)
141⁄2 (368)
Galvanized, Aluminum,
Weight*
99 (45)
56 (25)
All dimensions are in inches (millimeters). Weight in pounds
(kilograms). *Weight shown is the largest cataloged
Open Drip Proof motor. See page 8 for severe duty LBP
dimensions.

Model
Number

Motor
HP

Fan
RPM
600

712

937

1049

LB/LBP-10-4

1/4

1162

1274

1386

1499

1611

1689
LB/LBP-10-3

1/3
1767

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
539
0.013
3.0
639
0.021
3.6
841
0.048
5.1
942
0.067
5.9
1043
0.091
6.9
1144
0.12
8.0
1244
0.15
9.2
1346
0.19
10.0
1446
0.24
11.2
1516
0.28
12.2
1587
0.32
13.5

0.125
351
0.014
1.6
500
0.024
2.3
746
0.053
4.3
855
0.073
5.3
963
0.097
6.3
1070
0.13
7.5
1177
0.16
8.8
1283
0.2
9.8
1388
0.25
10.9
1461
0.29
11.9
1533
0.33
13.0

0.25

CFM / Static Pressure in Inches wg
0.375
0.5
0.625
0.75

0.875

1

1.125

MAX. BHP AT A GIVEN RPM - (rpm/2476)3
MAXIMUM FRPM = 1767
TIP SPEED = rpm x 2.913
MAX. MOTOR FRAME SIZE = 56
623
0.054
3.6
759
0.076
4.7
887
0.103
5.9
1004
0.13
7.1
1114
0.17
8.4
1224
0.21
9.5
1331
0.26
10.7
1406
0.3
11.6
1480
0.34
12.6

625
0.075
4.2
780
0.103
5.4
917
0.14
6.8
1047
0.18
8.2
1168
0.22
9.3
1280
0.27
10.4
1356
0.31
11.3
1432
0.35
12.2

618
0.099
4.7
818
0.14
6.3
953
0.18
7.9
1093
0.22
8.8
1220
0.28
10.1
1304
0.32
11.0
1385
0.36
11.9

861
0.17
7.3
1006
0.22
8.3
1142
0.28
9.5
1237
0.32
10.6
1327
0.36
11.7

910
0.22
7.8
1064
0.28
9.0
1158
0.32
9.9
1254
0.36
11.0

970
0.27
8.5
1087
0.32
9.5
1182
0.36
10.5

980
0.31
8.9
1112
0.36
10.1

997
0.36
9.5

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

13

LB/LBP 14
Belt Drive
LB Dimensions

OF
TH
IS
EF
T
EL

0.2

0

0.0
0

(813)

TH
TO

0

900

1200

1500

1800

2100

2400

2700

1000

2000

3000

4000

3

m /hr

(406)

17

26

13⁄4

600

(1016)

(432)

26

(660)

(44)

0

16

300

cfm

40

32

N

48

DO

2

O
T

50

LBP Dimensions

43

0.4

65

(660)

70

(660)

100

(102)

5

(44)

4

26

0.6

RPM
HP
Density 0.075 lb/ft3

hp

7

26

2

82

13⁄4

150

hp

0.8

1/

11

(457)

200

hp

13

18

4

99

Static Pressure Pa

(445)

1/

1.0

URV
E

3

250

S YS
TEM
C

1/

(991)

SE
LE
CT

17 ⁄2

(889)

1.2

39

1

Static Pressure in. wg

35

(660)

LB-14
Hood Thickness
22 ga
Cover Thickness
Louver Thickness
Curb Cap Thickness 0.064 (0.029)
Damper Size Square
16 (406)
Roof Opening Square 181⁄2 (470)
Galvanized,
Weight*
81 (37)

LBP-14
0.064 (0.029)
0.081 (0.036)
0.064 (0.029)
16 (406)
181⁄2 (470)
Aluminum,
116 (53)

All dimensions are in inches (millimeters). Weight in pounds
(kilograms). *Weight shown is the largest cataloged
Open Drip Proof motor. See page 8 for severe duty LBP
dimensions.

Model
Number

Motor
HP

Fan
RPM
480

564

731

LB/LBP-14-4

1/4

815

899

982

1066

1118
LB/LBP-14-3

1/3
1170

1257
LB/LBP-14-5

1/2
1343

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
903
0.022
4.1
1061
0.035
4.7
1375
0.077
5.9
1533
0.11
6.7
1690
0.14
7.5
1847
0.19
8.5
2004
0.24
9.8
2102
0.27
10.7
2200
0.31
11.5
2364
0.39
12.9
2525
0.47
14.4

0.125
614
0.025
3.2
848
0.041
4.2
1231
0.086
5.6
1402
0.12
6.4
1574
0.15
7.3
1743
0.2
8.4
1912
0.25
9.7
2016
0.28
10.6
2120
0.32
11.3
2290
0.4
12.7
2456
0.49
14.1

0.25

CFM / Static Pressure in Inches wg
0.375
0.5
0.625
0.75

0.875

1

1.125

MAX. BHP AT A GIVEN RPM - (rpm/1639)3
MAXIMUM FRPM = 1343
TIP SPEED = rpm x 3.829
MAX. MOTOR FRAME SIZE = 56
1024
0.089
5.1
1241
0.12
5.9
1439
0.16
6.9
1629
0.21
8
1807
0.26
9.4
1913
0.3
10.3
2019
0.34
11.1
2197
0.42
12.5
2372
0.51
13.8

1013
0.12
5.4
1264
0.17
6.4
1482
0.21
7.5
1681
0.27
8.9
1801
0.31
9.8
1920
0.36
10.6
2112
0.44
12.1
2289
0.53
13.5

946
0.15
5.7
1297
0.21
7
1534
0.28
8.4
1672
0.32
9.3
1797
0.36
10.1
2002
0.44
11.6
2199
0.54
13.1

1351
0.27
7.8
1512
0.32
8.7
1657
0.36
9.5
1887
0.45
11.1
2092
0.55
12.6

1257
0.3
8.1
1487
0.36
9.0
1748
0.45
10.5
1979
0.55
12.2

1585
0.44
10.1
1848
0.55
11.6

1692
0.54
11.1

1386
0.51
10.4

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

14

LB/LBP 18
Belt Drive
LB Dimensions
(445)

30

(44)

30

(762)

(762)

200

(114)

1/

1.5

3

1/

4

1.0

1/

2

hp

LBP Dimensions
19

(914)

14

60

12

61

10

62

86
66

46

4

N

5

1000

2000

3000

4000

5000

6000

cfm

46

36

DO

hp

3

OT
0.0
0

0

2

RPM
HP
Density 0.075 lb/ft3

hp

hp

hp

0.5

1/

OT
HE
LEF
TO
F TH
IS S

1 ⁄4
3

Static Pressure in. wg

4 ⁄2
1

hp

(533)

400

hp

4

21

1

3/

Static Pressure Pa

2.0

2
1

YST
EM

(991)

TT

(1016)

CUR
VE

17 ⁄2

2.5

600

39

1

SE
LE
C

40

0

2

4

(1168)

6

8

10

3

m /hr X 1000

(483)

241⁄2
(622)

30

13⁄4

30

(762)

(44)

(762)

LB-18
LBP-18
Hood Thickness
22 ga
Cover Thickness
0.064 (0.029)
Louver Thickness
0.081 (0.036)
Curb Cap Thickness 0.064 (0.029) 0.064 (0.029)
Damper Size Square
18 (457)
18 (457)
Roof Opening Square 201⁄2 (521)
201⁄2 (521)
Galvanized, Aluminum,
Weight*
179 (81)
135 (61)
All dimensions are in inches (millimeters). Weight in pounds
(kilograms). *Weight shown is the largest cataloged
Open Drip Proof motor. See page 8 for severe duty LBP
dimensions.

Model
Number

Motor
HP

Fan
RPM
465

LB/LBP-18-4

1/4

562

755

LB/LBP-18-3

1/3

826

888
LB/LBP-18-5

1/2
949

LB/LBP-18-7

3/4

1085

LB/LBP-18-10

1

1141

1286
LB/LBP-18-15

11⁄2
1375

LB/LBP-18-20

2

1460

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
1753
0.056
3.6
2119
0.099
4.9
2847
0.24
8.7
3115
0.31
10.2
3348
0.39
11.7
3578
0.48
13.4
4091
0.71
16.8
4302
0.83
18.0
4849
1.19
21
5185
1.45
24
5505
1.73
26

0.125
1422
0.064
2.7
1871
0.108
4.1
2671
0.25
7.9
2957
0.33
9.5
3203
0.4
11.0
3442
0.49
13.0
3972
0.73
16.2
4189
0.84
17.3
4749
1.2
20
5091
1.47
23
5417
1.76
25

0.25

1522
0.114
3.4
2474
0.27
7.4
2778
0.34
8.9
3039
0.42
10.4
3292
0.51
12.0
3847
0.75
15.5
4073
0.86
16.7
4648
1.22
19.8
4997
1.49
22
5328
1.78
24

CFM / Static Pressure in Inches wg
0.5
0.75
1
1.25

1.5

1.75

2

MAX. BHP AT A GIVEN RPM - (rpm/1157)3
MAXIMUM FRPM = 1460
TIP SPEED = rpm x 4.843
MAX. MOTOR FRAME SIZE = 145T
1925
0.27
6.5
2324
0.36
8.0
2638
0.45
9.4
2936
0.54
11.0
3575
0.79
14.6
3814
0.91
15.9
4423
1.27
19.2
4790
1.54
21
5138
1.83
23

2110
0.44
8.7
2498
0.55
10.3
3218
0.82
13.4
3493
0.94
14.8
4183
1.32
18.5
4576
1.59
21
4936
1.88
23

2822
0.82
12.9
3140
0.96
14.1
3880
1.35
17.8
4311
1.63
20
4714
1.93
22

2674
0.93
13.8
3568
1.37
17.4
4025
1.66
19.9
4446
1.98
22

3208
1.35
17.1
3719
1.67
19.6
4176
2
22

3382
1.65
19.5
3874
2
22

3538
1.97
22

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

15

LB/LBP 21
Belt Drive
LB Dimensions

E

TO

00

FT

12

LEF

53

10

HE

CT
TO
T

6

LE

9

75

SE

OT

2
5

N

1000

2000

3000

46

0

2

4

4000

5000

6000

7000

8000

6

8

10

12

3

(1168)

m /hr X 1000

(483)

(622)

30

13⁄4

DO

cfm

241⁄2

30

(762)

(44)

0.0
0

0

46

19

61

36

90

0.5

100

LBP Dimensions
(914)

HIS
S

hp

Static Pressure in. wg

4

hp

Static Pressure Pa

3/

4

hp

1/

3

(152)

1.0

1/

6

30
(762)

hp

30
(762)

200

2

13⁄4

300

1.5

1/

23

hp

400

hp

hp

1

(584)

RPM
HP
Density 0.075 lb/ft3

2

2

(1295)

(584)

(44)

YST
EM
CUR
V

1/

23

(1092)

2.0

51

1

43

(762)

LB-21
LBP-21
Hood Thickness
22 ga
Cover Thickness
0.064 (0.029)
Louver Thickness
0.081 (0.036)
Curb Cap Thickness 0.064 (0.029) 0.064 (0.029)
Damper Size Square
18 (457)
18 (457)
Roof Opening Square 201⁄2 (521)
201⁄2 (521)
Galvanized, Aluminum,
Weight*
191 (86)
145 (66)
All dimensions are in inches (millimeters). Weight in pounds
(kilograms). *Weight shown is the largest cataloged
Open Drip Proof motor. See page 8 for severe duty LBP
dimensions.

Model
Number

Motor
HP

Fan
RPM
465

LB/LBP-21-4

1/4
595

LB/LBP-21-3

1/3

651
699

LB/LBP-21-5

1/2
747
801

LB/LBP-21-7

3/4
855

LB/LBP-21-10

1

899
1010

LB/LBP-21-15

11⁄2
1077

LB/LBP-21-20

2

1200

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
2820
0.12
6.6
3609
0.24
8.8
3948
0.32
10.1
4239
0.39
11.6
4531
0.48
13.4
4858
0.59
15.5
5186
0.72
16.7
5452
0.83
17.1
6126
1.18
20
6532
1.43
22
7278
1.98
26

0.25
1732
0.13
5.2
2938
0.28
7.8
3371
0.36
8.8
3724
0.44
9.9
4056
0.53
11.2
4424
0.65
12.9
4790
0.79
14.4
5087
0.91
15.4
5826
1.26
18.9
6260
1.52
21
7034
2.07
25

0.375

2457
0.28
6.9
2970
0.36
8.2
3362
0.45
9.3
3741
0.54
10.4
4157
0.66
11.8
4553
0.8
13.3
4858
0.93
14.5
5614
1.3
18.1
6068
1.56
20
6890
2.12
25

CFM / Static Pressure in Inches wg
0.5
0.625
0.75
1

1.25

1.5

1.75

MAX. BHP AT A GIVEN RPM - (rpm/910)3
MAXIMUM FRPM = 1200
TIP SPEED = rpm x 5.596
MAX. MOTOR FRAME SIZE = 145T
2354
0.34
6.9
2954
0.45
8.6
3390
0.55
9.8
3833
0.67
11.3
4261
0.81
12.8
4602
0.94
13.9
5415
1.32
17.3
5877
1.59
19.4
6712
2.18
24

1964
0.38
7.1
2909
0.53
9.1
3491
0.68
10.8
3954
0.82
12.1
4313
0.95
13.4
5183
1.34
16.6
5691
1.61
18.8
6542
2.2
23

2937
0.64
10.1
3608
0.82
11.5
4019
0.96
12.7
4926
1.35
16.2
5451
1.62
18.2
6375
2.22
23

2894
0.86
11.7
4386
1.36
15.0
4965
1.65
17.3
5954
2.25
22

3369
1.24
14.0
4395
1.63
16.4
5517
2.28
21

5013
2.26
20

4122
2.11
18.5

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

16

LB/LBP 24
Belt Drive
LB Dimensions

1.6

23 ⁄2
1

(597)

34

(44)

34

(864)

(864)

63⁄4

200
150
100

(171)

2

0.8

1/

4

1/

3

hp

20

(1016)

hp

hp

0.6
0.4
0.2

0

0.0
0

T
NO

1000

CU
RVE

RPM
HP
Density 0.075 lb/ft3

hp

91

0

79

9

68

8

57

7

46

6

S

35

5

2000

3000

491⁄2

0

2

4

4000

5000

6000

7000

8000

9000

6

8

10

12

14

3

m /hr X 1000

(1257)

(508)

(597)

34

13⁄4

4

2

cfm

231⁄2

34

(864)

(44)

3/
hp

hp

YS
TEM

1/

1.0

DO

40

2

1.2

50

LBP Dimensions

1/

hp

EL

13⁄4

250

1

EF
TO

Static Pressure Pa

300

1

1.4

TH
EL

(521)

350

TO

(1156)

(1295)

EC
T

20 ⁄2

Static Pressure in. wg

45 ⁄2

1

FT
HIS
S

51

1

(864)

LB-24
LBP-24
Hood Thickness
22 ga
Cover Thickness
0.064 (0.029)
Louver Thickness
0.081 (0.036)
Curb Cap Thickness 0.064 (0.029) 0.064 (0.029)
Damper Size Square
24 (610)
24 (610)
Roof Opening Square 261⁄2 (673)
261⁄2 (673)
Galvanized, Aluminum,
Weight*
239 (108)
188 (85)
All dimensions are in inches (millimeters). Weight in pounds
(kilograms). *Weight shown is the largest cataloged
Open Drip Proof motor. See page 8 for severe duty LBP
dimensions.

Model
Number

Motor
HP

Fan
RPM
355

LB/LBP-24-4

1/4

409

462

LB/LBP-24-3

1/3

508

LB/LBP-24-5

1/2

582

625
LB/LBP-24-7

3/4
667

LB/LBP-24-10

1

734

LB/LBP-24-15

11⁄2

787

868
LB/LBP-24-20

2
910

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
3419
0.11
5.8
3938
0.17
6.3
4449
0.24
7.4
4892
0.32
8.5
5604
0.48
10.7
6018
0.59
12.4
6423
0.72
14.1
7068
0.96
17.0
7578
1.18
19.6
8358
1.58
24
8763
1.82
27

0.25

2715
0.19
5.1
3451
0.28
6.3
4043
0.36
7.4
4917
0.54
9.4
5381
0.66
11.0
5828
0.8
12.7
6531
1.05
15.3
7080
1.29
17.4
7907
1.7
21
8333
1.95
24

0.375

CFM / Static Pressure in Inches wg
0.5
0.625
0.75
0.875

1

1.25

1.375

MAX. BHP AT A GIVEN RPM - (rpm/710)3
MAXIMUM FRPM = 910
TIP SPEED = rpm x 6.414
MAX. MOTOR FRAME SIZE = 145T
2491
0.25
5.3
3433
0.36
6.8
4441
0.55
8.9
4988
0.68
10.3
5505
0.82
12.0
6252
1.08
14.6
6820
1.32
16.5
7675
1.74
20
8114
2
23

3899
0.55
8.4
4497
0.68
10.0
5062
0.83
11.5
5912
1.1
13.9
6560
1.35
15.9
7440
1.78
19.4
7889
2.04
21

3929
0.66
9.5
4589
0.83
11.1
5503
1.1
13.5
6190
1.36
15.4
7192
1.81
18.9
7664
2.07
21

3984
0.79
10.9
5073
1.1
13.2
5799
1.36
15.0
6855
1.82
18.3
7377
2.09
20

4555
1.07
12.9
5398
1.36
14.8
6505
1.83
17.9
7056
2.1
19.8

4909
1.32
14.1
6141
1.82
17.6
6713
2.1
19.5

5285
1.76
16.0
5995
2.08
18.4

5537
2.03
17.2

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

17

LB/LBP 30
Belt Drive
LB Dimensions

2.0

hp

SY
STE
M
HIS

FT
TO

TH
CT
TO

SE
LE

6

40

8

10

12

14

16

5

10

15

20

25

3

m /hr X 1000

(673)

(1016)

5

0

0

(1473)

261⁄2

13⁄4

83
4
3

2
1
4

(584)

(44)

71
59

35

23

2

cfm X 1000

58

46
(1168)

T

23

0.0
0

NO

RPM
HP
Density 0.075 lb/ft3

47

hp

DO
0

hp

Static Pressure in. wg

2
1/

3
1/

Static Pressure Pa

1
hp

0.5

100

LBP Dimensions

hp

2
1/

(1016)

1.0

4
3/

(1016)

(216)

hp

40

200

1.5

1

(44)

81⁄2

40

300

hp

26 ⁄8
(676)

2

400

EL
EF

(749)
5

13⁄4

CU
RVE

3

(1270)

(1600)

hp

291⁄2

5

63

50

40
(1016)

LB-30
LBP-30
Hood Thickness
22 ga
Cover Thickness
0.064 (0.029)
Louver Thickness
0.081 (0.036)
Curb Cap Thickness 0.064 (0.029) 0.064 (0.029)
Damper Size Square
30 (762)
30 (762)
Roof Opening Square 321⁄2 (826)
321⁄2 (826)
Galvanized, Aluminum,
Weight*
318 (144)
249 (113)
All dimensions are in inches (millimeters). Weight in pounds
(kilograms). *Weight shown is the largest cataloged
Open Drip Proof motor. See page 8 for severe duty LBP
dimensions.

Model
Number

Motor
HP

Fan
RPM
230

LB/LBP-30-3

1/3
366

394
LB/LBP-30-5

1/2
421

LB/LBP-30-7

3/4

483

LB/LBP-30-10

1

529

567
LB/LBP-30-15

11⁄2
605

LB/LBP-30-20

2

667

LB/LBP-30-30

3

703

LB/LBP-30-50

5

835

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
3910
0.076
8.0
6221
0.31
8.7
6697
0.38
9.0
7156
0.47
9.7
8210
0.7
12.0
8992
0.92
13.8
9638
1.14
15.3
10284
1.38
16.8
11338
1.85
19.8
11950
2.17
22
14194
3.63
27

0.25

4729
0.37
5.9
5354
0.45
6.5
5939
0.54
7.4
7196
0.8
10.7
8079
1.04
12.9
8797
1.27
14.2
9507
1.53
15.7
10639
2.02
18.6
11287
2.34
20
13635
3.84
26

0.375

CFM / Static Pressure in Inches wg
0.5
0.625
0.75
1

1.25

1.5

1.75

MAX. BHP AT A GIVEN RPM - (rpm/512)3
MAXIMUM FRPM = 835
TIP SPEED = rpm x 7.985
MAX. MOTOR FRAME SIZE = 184T
4290
0.44
6.0
5076
0.55
6.7
6567
0.83
9.7
7559
1.07
12.1
8334
1.31
13.6
9073
1.57
15.2
10257
2.07
17.9
10935
2.41
19.5
13356
3.95
25

5777
0.83
8.8
6946
1.1
11.4
7786
1.34
13.0
8605
1.61
14.6
9863
2.12
17.5
10562
2.46
19.1
13062
4.03
25

6162
1.09
10.3
7174
1.36
12.3
8068
1.64
14.1
9419
2.16
17.1
10184
2.51
18.7
12747
4.09
24

6410
1.33
11.2
7434
1.64
13.3
8933
2.19
16.6
9722
2.54
18.3
12432
4.14
24

7737
2.17
14.9
8701
2.57
17.0
11728
4.24
23

7032
2.41
14.2
10951
4.33
22

9965
4.29
21

8478
4.06
18.2

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

18

LB/LBP 36
Belt Drive
LB Dimensions

ST
SY

TH
IS
EF
T

OF

8

TH
EL

6

58

49

TO

4

LE
CT

40

SE

3
31
1

0

22

2

4

6

0

8

10

10

12

14

16

18

20

20

30

3

(1600)

m /hr X 1000

(660)

343⁄8
(873)

46

13⁄4

hp

26

T
NO

cfm X 1000

63

513⁄4

46

(1168)

(44)

0.0
0

0

LBP Dimensions

67

2
1/

Static Pressure in. wg

1

Static Pressure Pa

hp

0.5

100

DO

(1314)

hp

2
hp

hp

(1168)

(1168)

2
1/

(248)

1.0

4
3/

(44)

93⁄4

46

46

200

hp

13⁄4

300

1.5

1

325⁄8
(829)

3

400

EM
CU
RVE

(1600)

(686)

RPM
HP
Density 0.075 lb/ft3

hp

27

(1524)

2.0

63

5

60

(1168)

LB-36
LBP-36
Hood Thickness
0.064 (0.029)
Cover Thickness
0.064 (0.029)
Louver Thickness
0.081 (0.036)
Curb Cap Thickness 0.064 (0.029) 0.064 (0.029)
Damper Size Square
36 (914)
36 (914)
Roof Opening Square 381⁄2 (978)
381⁄2 (978)
Galvanized, Aluminum,
Weight*
444 (201)
338 (153)
All dimensions are in inches (millimeters). Weight in pounds
(kilograms). *Weight shown is the largest cataloged
Open Drip Proof motor. See page 8 for severe duty LBP
dimensions.

Model
Number

Motor
HP

Fan
RPM
220

LB/LBP-36-5

1/2
315

LB/LBP-36-7

3/4

360

LB/LBP-36-10

1

397
426

LB/LBP-36-15

11⁄2
454

LB/LBP-36-20

2

499
536

LB/LBP-36-30

3
572
614

LB/LBP-36-50

5
678

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
6204
0.16
4.9
8884
0.47
8.2
10153
0.7
10.6
11196
0.94
13.7
12014
1.16
14.8
12804
1.41
16.0
14073
1.87
18.2
15116
2.31
20
16132
2.81
22
17316
3.48
25
19121
4.69
30

0.25

6937
0.55
6.3
8570
0.81
8.9
9816
1.08
12.1
10765
1.32
14.0
11668
1.58
15.4
13064
2.06
17.6
14196
2.52
19.7
15287
3.04
22
16540
3.72
24
18419
4.95
29

0.375

CFM / Static Pressure in Inches wg
0.5
0.625
0.75
0.875

1

1.25

1.5

MAX. BHP AT A GIVEN RPM - (rpm/384)3
MAXIMUM FRPM = 678
TIP SPEED = rpm x 9.425
MAX. MOTOR FRAME SIZE = 184T
7487
0.83
7.9
8911
1.1
10.6
9964
1.35
12.7
10949
1.63
14.5
12442
2.13
17.2
13646
2.61
19.3
14790
3.14
21
16087
3.84
24
18041
5.08
29

7775
1.1
9.4
9056
1.37
11.6
10127
1.65
13.7
11760
2.17
16.6
13037
2.67
18.7
14229
3.21
21
15598
3.93
24
17621
5.21
29

7716
1.34
10.1
9209
1.66
12.5
11004
2.2
16.1
12361
2.7
18.4
13649
3.26
20
15066
3.99
23
17165
5.3
28

7552
1.57
11.0
10173
2.2
15.1
11652
2.73
17.8
12989
3.29
19.9
14504
4.05
23
16683
5.37
27

8773
2.12
13.9
10837
2.72
16.7
12313
3.32
19.0
13890
4.08
22
16192
5.44
27

9559
2.65
15.8
11534
3.31
18.1
13262
4.1
21
15636
5.47
26

11584
4.04
19.2
14494
5.52
24

12970
5.45
22

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

19

LB/LBP 42
Belt Drive
LB Dimensions

5

(1905)

1 ⁄4
3

52

(44)

52

(1321)

(292)

(1321)

100

3/

4

0.6

2

0.4

DO

LBP Dimensions
29

(1473)

HIS
SY
S

TE

hp

2

NO

51

5

45

0

38

5

T

32

0

SE

25

5

19

0

4

6

8

10

12

14

16

18

20

22

24

cfm X 1000

701⁄2

58

hp

hp

1/

0.0
0

hp

FT
OF
T

1

0.2
0

1/

2

0.8

E

111⁄2

200

1

1.0

hp

hp

TH

373⁄8
(949)

2

1.2

LE
CT

Static Pressure Pa

300

Static Pressure in. wg

(851)

RPM
HP
Density 0.075 lb/ft3

hp

MC

3

UR
VE

1.4

LE

33 ⁄2

(1794)

1.6

75

1

TO

70 ⁄8
5

0

10

(1791)

20

30

40

3

m /hr X 1000

(737)

381⁄4
(972)

52

13⁄4

52

(1321)

(44)

(1321)

LB-42
LBP-42
Hood Thickness
0.064 (0.029)
Cover Thickness
0.064 (0.029)
Louver Thickness
0.081 (0.036)
Curb Cap Thickness 0.064 (0.029) 0.064 (0.029)
Damper Size Square
42 (1067)
42 (1067)
Roof Opening Square 441⁄2 (1130)
441⁄2 (1130)
Galvanized, Aluminum,
Weight*
530 (240)
396 (180)
All dimensions are in inches (millimeters). Weight in pounds
(kilograms). *Weight shown is the largest cataloged
Open Drip Proof motor. See page 8 for severe duty LBP
dimensions.

Model
Number

Motor
HP

Fan
RPM
190

LB/LBP-42-5

1/2
247

LB/LBP-42-7

3/4

283

LB/LBP-42-10

1

311

334
LB/LBP-42-15

11⁄2
356

LB/LBP-42-20

2

392

420
LB/LBP-42-30

3
448

482
LB/LBP-42-50

5
515

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
8328
0.21
5.2
10827
0.47
6.9
12405
0.71
8.3
13632
0.94
9.8
14640
1.17
11.5
15605
1.41
13.2
17183
1.89
16.1
18410
2.32
18.6
19637
2.82
22
21128
3.51
23
22574
4.28
25

0.125
6455
0.25
4.3
9583
0.53
6.0
11362
0.78
7.6
12718
1.02
9.3
13812
1.25
11.0
14828
1.5
12.7
16477
1.98
15.5
17751
2.42
18.0
19020
2.93
21
20554
3.63
23
22037
4.41
24

0.25

7772
0.55
5.5
9965
0.83
7.1
11521
1.08
8.7
12766
1.33
10.4
13887
1.58
12.1
15667
2.08
14.9
17030
2.52
17.3
18378
3.04
20
19980
3.74
22
21500
4.53
24

CFM / Static Pressure in Inches wg
0.375
0.5
0.625
0.75

0.875

1

1.25

MAX. BHP AT A GIVEN RPM - (rpm/301)3
MAXIMUM FRPM = 515
TIP SPEED = rpm x 11.061
MAX. MOTOR FRAME SIZE = 184T
7932
0.81
6.5
10057
1.1
8.3
11480
1.37
9.8
12733
1.64
11.5
14715
2.16
14.3
16205
2.62
16.6
17605
3.14
19.4
19281
3.86
22
20887
4.65
24

9795
1.35
9.2
11417
1.66
10.8
13626
2.21
13.7
15201
2.68
16.1
16740
3.22
18.8
18562
3.97
21
20214
4.77
23

9401
1.59
10.3
12382
2.21
13.2
14135
2.72
15.4
15786
3.28
18.1
17683
4.04
20
19480
4.87
22

10481
2.13
12.9
12945
2.72
15.3
14735
3.3
17.5
16796
4.1
19.3
18651
4.94
21

11013
2.61
15.2
13494
3.28
17.6
15798
4.11
18.7
17822
5.01
21

14692
4.09
18.5
16871
5.01
20

14331
4.88
19.3

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

20

LB/LBP 48
Belt Drive
LB Dimensions
(2210)

300

58
(1473)

(295)

100

4

1
hp

1/

2

0.4

50

0.2

0

0.0
0

hp

SYS

hp

hp

hp

DO

LBP Dimensions
32

(1626)

0

36

6

31

2

25

8

20

4

N

15

4

8

0
12

16

20

24

28

cfm X 1000

761⁄2

64

42

TH
EL

3/

0.6

RPM
HP
Density 0.075 lb/ft3

hp

EF
TO
FT
HI S

2

O

58
(1473)

1/

5

TO

1 ⁄4

150

2

1

0.8

SE
LE
CT

11 ⁄8
5

200

hp

1.0

T

Static Pressure Pa

411⁄2

Static Pressure in. wg

3

(1054)

(44)

1.2

(1041)
250

3

URV
E

41

(1788)

1.4

87

TEM
C

70 ⁄8
3

0

10

(1943)

20

30

40

3

m /hr X 1000

(813)

403⁄8
(1026)

13⁄4

58

58

(44)

(1473)

(1473)

LB-48
Hood Thickness
0.064 (0.029)
Cover Thickness
Louver Thickness
Curb Cap Thickness 0.064 (0.029)
Damper Size Square
48 (1219)
Roof Opening Square 501⁄2 (1283)
Galvanized,
Weight*
430 (195)

LBP-48
0.064 (0.029)
0.081 (0.036)
0.064 (0.029)
48 (1219)
501⁄2 (1283)
Aluminum,
579 (263)

All dimensions are in inches (millimeters). Weight in pounds
(kilograms). *Weight shown is the largest cataloged
Open Drip Proof motor. See page 8 for severe duty LBP
dimensions.

Model
Number

Motor
HP

Fan
RPM
150

LB/LBP-48-5

1/2

175

199

LB/LBP-48-7

3/4

226

LB/LBP-48-10

1

249

LB/LBP-48-15

1 ⁄2

267
1

285

LB/LBP-48-20

2

314

LB/LBP-48-30

3

359

381
LB/LBP-48-50

5
420

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
9666
0.21
6.1
11277
0.34
6.9
12824
0.5
7.6
14563
0.73
8.5
16046
0.98
9.5
17205
1.2
10.6
18365
1.46
12.3
20234
1.96
15.4
23134
2.93
18.4
24552
3.5
20
27065
4.69
23

0.125
6546
0.24
5.4
8948
0.38
5.6
10846
0.56
6.8
12863
0.81
8.2
14530
1.07
9.4
15823
1.31
10.4
17103
1.58
11.7
19141
2.1
14.5
22214
3.1
17.8
23685
3.68
19.6
26278
4.89
23

0.25

CFM / Static Pressure in Inches wg
0.375
0.5
0.625
0.75

0.875

0.9

1

MAX. BHP AT A GIVEN RPM - (rpm/241)3
MAXIMUM FRPM = 420
TIP SPEED = rpm x 12.632
MAX. MOTOR FRAME SIZE = 213T
7629
0.54
7.0
10741
0.83
7.5
12787
1.1
9.2
14222
1.35
10.2
15612
1.63
11.1
17779
2.17
13.4
21041
3.21
17.2
22620
3.81
19.1
25383
5.05
23

10092
1.08
8.3
12151
1.36
9.2
13896
1.66
10.5
16397
2.2
12.5
19878
3.25
16.5
21512
3.87
18.6
24354
5.15
23

11357
1.61
9.6
14665
2.22
12.2
18650
3.29
15.9
20378
3.92
17.9
23363
5.21
22

11934
2.1
11.5
17134
3.31
15.5
19104
3.95
17.4
22317
5.25
22

15069
3.25
14.8
17564
3.95
17.1
21159
5.29
21

11596
2.84
13.4
15491
3.86
16.2
19839
5.31
21

15076
3.85
16.0
19534
5.3
21

18029
5.23
20

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

21

LB/LBP 54
Belt Drive
LB Dimensions

35

64
(1626)

SY
STE

H IS
FT
TO

EF
TH
EL

3

TO

0

(2121)

NO

18

5

4

13

0

10

15

10

20

20

25

30

35

40

30

40

50

60

3

m /hr X 1000

(889)

(1108)

13⁄4

8

cfm X 1000

435⁄8

(44)

0.0
0

83 ⁄2

70

34

29

1

(1778)

1

9

T

0.2

0

40

23

SE
LE
CT

Static Pressure in. wg

Static Pressure Pa

hp

hp

0.4

DO

LBP Dimensions

hp

1

50

0.6

2

(1626)

100

1/

(318)

0.8

1

12 ⁄2

64

hp

64
(1626)

150

1.0

2

13⁄4

1

200

2

hp

(1153)

RPM
HP
Density 0.075 lb/ft3

1/

3

250

453⁄8

(44)

1.2

7

(965)

300

hp

(2019)

(2210)

5

38

MC
UR
VE

1.4

87

79 ⁄2
1

64
(1626)

LB-54
Hood Thickness
0.064 (0.029)
Cover Thickness
Louver Thickness
Curb Cap Thickness 0.064 (0.029)
Damper Size Square
54 (1372)
Roof Opening Square 561⁄2 (1435)
Galvanized,
Weight*
596 (270)

LBP-54
0.064 (0.029)
0.081 (0.036)
0.064 (0.029)
54 (1372)
561⁄2 (1435)
Aluminum,
780 (354)

All dimensions are in inches (millimeters). Weight in pounds
(kilograms). *Weight shown is the largest cataloged
Open Drip Proof motor. See page 8 for severe duty LBP
dimensions.

Model
Number

Motor
HP

Fan
RPM
130

LB/LBP-54-10

1

155

206

LB/LBP-54-15

11⁄2

235

LB/LBP-54-20

2

258

277
LB/LBP-54-30

3
296

323
LB/LBP-54-50

5
350

376
LB/LBP-54-75

71⁄2
401

CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones
CFM
BHP
Sones

0
12159
0.25
4.6
14497
0.42
5.8
19267
0.99
8.7
21980
1.47
11.2
24131
1.95
12.1
25908
2.41
14.1
27685
2.94
17.6
30210
3.82
19.3
32736
4.87
18.9
35167
6.03
22
37506
7.32
25

0.125

11186
0.48
4.9
17356
1.1
8.5
20319
1.6
11.2
22628
2.09
12.5
24517
2.57
13.4
26383
3.11
15.5
29017
4.01
17.8
31634
5.06
19.5
34142
6.25
23
36544
7.54
26

0.25

CFM / Static Pressure in Inches wg
0.375
0.5
0.625
0.75

0.875

1

1.125

MAX. BHP AT A GIVEN RPM - (rpm/198)3
MAXIMUM FRPM = 401
TIP SPEED = rpm x 14.137
MAX. MOTOR FRAME SIZE = 213T
13895
1.12
8.7
17983
1.66
11.3
20831
2.18
13.0
22962
2.68
14.1
25030
3.25
15.2
27789
4.17
17.3
30514
5.25
20
33111
6.45
23
35583
7.77
26

14194
1.6
11.7
17904
2.21
13.3
20554
2.72
14.4
23122
3.31
16.0
26305
4.27
18.4
29312
5.39
21
32039
6.62
24
34583
7.96
27

17326
2.65
13.7
20394
3.34
15.1
24165
4.31
18.3
27766
5.46
22
30716
6.72
25
33500
8.11
28

16072
3.1
13.1
21535
4.29
16.8
25487
5.5
21
29030
6.79
26
32150
8.19
29

17215
4.01
14.7
22974
5.43
19.0
26889
6.82
24
30332
8.24
29

18944
5.13
17.8
24483
6.71
22
28324
8.29
27

20824
6.4
21
26018
8.13
26

22767
7.81
24

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (Bhp) does not include transmission losses. Performance ratings include the effects of a
birdscreen in the airstream. The sound ratings shown are loudness values in fan sones at 5 feet (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values
shown are for installation type A: Free inlet hemispherical sones.

22

Specifications

Direct Drive Specifications
The LD and LDP exhaust fans shall be direct drive type. The fan wheel shall be centrifugal backward
inclined, constructed of aluminum and shall include a wheel cone carefully matched to the fan’s venturi
for precise running tolerances. Wheels shall be statically and dynamically balanced. The fan shall be
constructed of heavy gauge steel or aluminum with a rigid internal support structure and a birdscreen.
Motors shall be mounted on vibration isolators. Motors shall be readily accessible for maintenance.
A disconnect switch shall be factory installed and wired from the fan motor to a junction box within
the motor compartment. A conduit chase shall be provided through the curb cap to the motor
compartment for ease of electrical wiring.
All fans shall bear the AMCA Certified Ratings Seal for sound and air performance.
Each fan shall bear a permanently affixed manufacturer’s engraved aluminum nameplate containing the
model number and individual serial number for future identification.
Fans shall be models LD or LDP as manufactured by Greenheck Fan Corporation in Schofield,
Wisconsin, USA.

BELT DRIVE SPECIFICATIONS
The LB and LBP exhaust fans shall be belt drive type. The fan wheel shall be centrifugal backward
inclined, constructed of aluminum and shall include a wheel cone carefully matched to the fan’s venturi
for precise running tolerances.
Wheels shall be statically and dynamically balanced. The fan shall be constructed of heavy gauge steel
or aluminum with a rigid internal support structure and birdscreen.
Motors shall be heavy duty ball bearing type, carefully matched to the fan load, and furnished at the
specified voltage, phase and enclosure. Drive frame assembly shall be constructed of heavy gauge
steel. Motors and drives shall be mounted on vibration isolators. Motors and drives shall be readily
accessible for maintenance.
Precision ground and polished fan shafts shall be mounted in permanently sealed, lubricated pillow
block ball bearings. Bearings shall be selected for a minimum L10 life in excess of 100,000 hours
(L50 average of 500,000 hours) at maximum cataloged operating speed. Drives shall be sized for a
minimum of 150% of driven horsepower. Pulleys shall be of the cast type, keyed and securely attached
to the wheel and motor shafts.
Motor pulleys shall be adjustable for final system balancing. A disconnect switch shall be factory
installed and wired from the fan motor to a junction box installed within the motor compartment. A
conduit chase shall be provided through the base to the motor compartment for ease of electrical
wiring.
All fans shall bear the AMCA Certified Ratings Seal for sound and air performance.
Each fan shall bear a permanently affixed manufacturer’s engraved aluminum nameplate containing the
model number and individual serial number for future identification.
Fans shall be models LB or LBP as manufactured by Greenheck Fan Corporation in Schofield,
Wisconsin, USA.

23

Other Exhaust Fans
Models G and GB, direct or belt drive, spun aluminum downblast
centrifugal roof exhaust fans are an economical means of exhausting air.
They utilize a backward inclined wheel and are available in 45 different
sizes. Performance capacities range up to 3.25 in. wg (810 Pa) of static
pressure and from 50 to 44,700 cfm (85 to 75,900 m3/hr).
Series C models CUE, CUBE, CW and CWB, are commonly used for
general clean air, mild grease and fume hood exhaust applications. Both
roof upblast and sidewall configurations are specifically designed to
discharge air directly away from the mounting surface. These models are
constructed of aluminum and use an aluminum backward inclined wheel.
They are UL/cUL Listed for electrical or grease. Performance capacities
ranges up to 5 in. wg (1242 Pa) and up to 30,000 cfm (51,000 m3/hr).
Model SWB centrifugal backward inclined belt driven utility fans are designed
for supply, exhaust and return air applications requiring higher discharge
velocities and high static pressures. The SWB Series 100 is for general clean air
applications. The SWB Series 200 fans are constructed with heavy gauge steel.
Designed for light industrial duty and grease applications, it’s capacities range
from 70 to 27,000 cfm (120 to 45,900 m3/hr) and up to 5 in. wg (1,118 Pa) of
static pressure. SWB fans can be mounted indoors or outdoors.
Models NYD and NYB, direct or belt drive, tamper resistant centrifugal roof
exhaust fans are galvanized construction and prevent entry into the unit
and/or building. They utilize a backward inclined wheel and are available in
10 different sizes. Performance capacities range from 170 to 8,080 cfm (290
to 13,700 m3/hr) and up to 1 in. wg (249 Pa) of static pressure.

Building Value in Air
Greenheck delivers value
to mechanical engineers by
helping them solve virtually
any air quality challenges
their clients face with a
comprehensive selection of

top quality, innovative airrelated equipment. We offer
extra value to contractors
by providing easy-to-install,
competitively priced, reliable
products that arrive on time.

And building owners and
occupants value the energy
efficiency, low maintenance
and quiet dependable operation
they experience long after the
construction project ends.

Our Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period
of one year from the purchase date. Any units or parts which prove defective during the warranty
period will be replaced at our option when returned to our factory, transportation prepaid. Motors are
warranted by the motor manufacturer for a period of one year. Should motors furnished by Greenheck
prove defective during this period, they should be returned to the nearest authorized motor service
station. Greenheck will not be responsible for any removal or installation costs.
As a result of our commitment to continuous improvement, Greenheck reserves the right to change
specifications without notice.

P.O. Box 410 • Schofield, WI 54476-0410 • Phone (715) 359-6171 • greenheck.com

Prepared to Support
Green Building Efforts

Catalog Series L Rev 4 April 2008 R
Copyright © 2008 Greenheck Fan Corp.



---

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