Greenheck Fan Series L Users Manual

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Centrifugal Roof Exhaust Fans

Series L

Low Silhouette

April

2008

Louvered Penthouse Style

LDP/LBP

Fabra Hood Style

LD/LB

2

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.

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.

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.

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

3

Unique Construction Features

Louvered Penthouse

S

t

y

le

•

Hinged

C

over

-

All

si

z

es

fea

t

u

r

e

a

n

a

l

um

i

num cover w

hi

c

h

ma

y

b

e

hi

n

g

e

d

to

p

rovide quick access to the motor an

d

d

rive assembly.

C

overs are fastened down

w

i

t

h

a

q

u

i

c

k

re

l

ease

h

oo

d

l

atc

h.

•

Lar

g

e Interior Dimensions

-

All

s

iz

es

a

ll

o

w

c

omp

l

ete access

ibili

ty

f

rom a

b

ove.

I

nter

i

o

r

di

mens

i

ons o

ff

er c

l

earance

f

or

i

ns

p

ect

i

on,

c

leanin

g

, or maintenance of the motor,

wheel, belt

(

s

)

, and drives.

•

Stren

g

th & Weather Resistant -

E

ac

h

un

i

t

fea

t

u

r

es

s

t

o

rm r

es

i

s

t

a

nt

a

l

u

min

u

m l

ou

v

e

r

bl

a

d

es w

i

t

h

m

i

tere

d

corners.

F

or

d

eca

d

es

,

o

ur storm res

i

stant

bl

a

d

es

h

ave

p

roven

hi

g

hl

y

effective. Each sturd

y

extruded

alu

m

i

n

u

m

lou

v

e

r

blade

has

a

m

a

t

e

r

ial

thi

c

k

ness o

f

0

.

080

i

nc

h

e

s.

G

reenheck’s louvered

p

enthouse hoods feature

h

eavy gauge extru

d

e

d

aluminum louvers

with mit

e

r

ed

co

rn

e

r

s

f

or a c

l

ean,

fi

n

i

s

h

e

d

appearance and weather

r

es

i

s

t

a

nt

co

n

s

tr

uc

ti

o

n

.

Th

e

i

nter

i

or vert

i

ca

l

e

d

ge o

f

t

h

e cur

b

cap

f

orms t

h

e t

h

roat an

d

weat

h

ers

hi

e

ld

.

E

ac

h

c

orner is also shielded to prevent leaka

g

e.

P

ent

h

ouses are ava

il

a

bl

e

i

n a

l

um

i

num

f

or

l

astin

g

durabili

ty

and a

pp

earance.

F

abra Hood

S

t

y

l

e

•

Hi

nge

d

H

oo

d

-

All

s

i

zes

f

eature a

h

oo

d

w

hich ma

y

be hin

g

ed to provide quic

k

a

ccess to the motor and drive assembl

y

.

A

ccess may

b

e ga

i

ne

d

b

y s

i

mp

l

y remov

i

ng

two of the four hood fasteners or all

fasteners for complete removal

.

•

L

arge

I

nter

i

or

Di

mens

i

ons

-

All

s

i

zes a

ll

ow

complete accessibilit

y

. Interior dimension

s

offer clearance for inspection, cleanin

g

, or

maintenance of the motor, wheel, belt

(

s

)

,

a

nd drives

.

• Stren

g

th & Weather Resistance - Th

e

h

oo

d

i

s

d

es

i

gne

d

w

i

t

h

arc

h

e

d

pane

l

s

manu

f

acture

d

o

f

h

eav

y

g

au

g

e, prec

i

s

i

on ro

ll

formed steel with interlockin

g

ed

g

es. Each

i

nter

l

oc

ki

ng r

ib

creates a t

i

g

h

t, weat

h

er

res

i

stant sea

l

.

H

eav

y

g

au

g

e stee

l

support

members provide structural stren

g

th. The

fi

rst

h

oo

d

was

p

ut

i

nto serv

i

ce over

30

y

ears a

g

o.

Greenheck’s interlockin

g

rib desi

g

n combines

four material thicknesses with I-beam design

pr

i

nc

i

p

l

es pro

d

uc

i

ng a

h

oo

d

f

ar super

i

o

r

in stren

g

th to

co

nv

e

nti

o

n

a

l

designs

(

an

important feature

in high wind

a

n

d

snow

l

oa

d

re

g

ions)

.

Fo

rm

ed

c

h

a

nn

e

l

s

adj

acent to t

h

e r

ib

s prov

id

e water

d

ra

i

nage to

ensure weather ti

g

htness.

Hoods are available in

g

alvanized steel,

pa

i

nte

d

stee

l

, or a

l

um

i

num construct

i

on

.

4

1

2

5

6

8

9

10

11

12

13

14

15

3

4

7

5

10

11

6

9

13

LBP/LDP

LOUVERED PENTHOUSE STYLE

LB/LD

FABRA HOOD STYLE

5

Unique Construction Features

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.

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.

Recommended

Duct and

Damper Size

Recommended

Roof Opening

1 1/4 in.

(32 mm)

3/4 in.

(19 mm)

Damper

8 to 12 in.

(203 to 305 mm)

1 1/4 in.

(32 mm)

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).

HINGED ACCESS - The entire hood assembly

on models LD and LB can be hinged open for

access to the internal fan components.

LOUVERED PENTHOUSE - Models LDP and

LBP penthouse style housings are constructed

of heavy extruded aluminum louvers with

mitered and welded corners.

HOOD COVER - Models LDP and LBP

aluminum hood covers are hinged and

removable for access.

DRIVE FRAME - Constructed from heavy

gauge galvanized steel. Belt adjustment is

accomplished by loosening fasteners, sliding

the motor plate, and retightening fasteners.

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.

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).

CURB CAP - Curb cap has prepunched

mounting holes to ensure correct attachment to

the curb.

MOTOR - Permanently lubricated, sealed ball

bearing motors are selected to provide years of

trouble-free operation.

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.

WHEEL - An aluminum, backward inclined,

non-overloading, centrifugal wheel is utilized

to deliver maximum efficiency. Each wheel is

statically and dynamically balanced.

VIBRATION ISOLATORS - Support the drive

assembly and wheel without steel to steel

contact providing long life and quiet operation.

BIRDSCREEN - Galvanized rigid wire protects

the fan’s discharge from birds or small objects.

(Aluminum birdscreen is optional).

WINDBAND - Lower windband assembly

ensures weathertight and rigid unit

construction.

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.

CONDUIT CHASE - A large diameter conduit for

installing electrical wiring through the curb cap

into the motor compartment. (Not shown)

1

2

3

4

5

6

7

8

10

9

11

12

13

14

15

16

6

Options and Accessories

BIRDSCREEN - Galvanized mesh is standard.

Optional aluminum or stainless steel rigid wire are

also available.

HOOD INSULATION - Hood insulation is dual-

density 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.

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.

7

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.

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

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.

NOTICE OF ACCEPTANCE NUMBER 03-0422.05

OUTSIDE CURB DIMENSION

ROOF OPENING

12, 18 OR 24 INCHES

(305, 457, 610 MM)

THROAT DIMENSION

(ROOF OPENING)

1 INCH (25 MM) INSULATION

6 INCH x 3 INCH

(152 MM x 76 MM)

STEEL MOUNTING ANGLE

(12 GAUGE MINIMUM)

RECOMMENDED

DUCT & DAMPER SIZE

1 1/4 INCH (32 MM)

4 IN.

(102 MM)

1 3/4 INCH (44 MM)

3/4 INCH (19 MM)

4 IN.

(102 MM)

4 INCH

(102 MM) 4 INCH

(102 MM)

1 3/4 INCH

(44 MM)

2 1/2 INCH (64 MM)

2 1/2 INCH (64 MM)

1 3/4 INCH (44 MM)

CONCRETE ROOF TRUSS

CORRUGATED

ROOF DECK

8

Severe Duty Dimensions

LDP - SEVERE DUTY DIMENSIONS

LBP - SEVERE DUTY DIMENSIONS

AA

D

CB

E

A

A

D

C

B

E

Model

Number ABCDE

Damper

Size

(square)

Roof

Opening

(square)

Weight* Cover

Thickness

Louver

Thickness

Curb Cap

Thickness

LDP

60

17

(432)

347⁄8

(886)

347⁄8

(886)

175⁄8

(448)

13⁄4

(44)

8

(203)

101⁄2

(267)

375

(170)

0.100

(0.045)

aluminum

0.125

(0.056)

aluminum

0.25

(0.113)

steel

65

70

75

80

19

(483)

367⁄8

(934)

367⁄8

(934)

175⁄8

(448)

13⁄4

(44)

10

(254)

121⁄2

(318)

400

(181)

85

90

95

100 22

(559)

397⁄8

(1013)

397⁄8

(1013)

195⁄8

(498)

13⁄4

(44)

12

(305)

141⁄2

(368)

425

(193)

120

LBP

10 22

(559)

397⁄8

(1013)

503⁄8

(1280)

181⁄8

(460)

13⁄4

(44)

12

(305)

101⁄2

(267)

550

(249)

0.100

(0.045)

aluminum

0.125

(0.056)

aluminum

0.25

(0.113)

steel

14 26

(660)

437⁄8

(1114)

517⁄8

(1318)

181⁄8

(460)

13⁄4

(44)

16

(406)

101⁄2

(267)

550

(249)

18 30

(762)

477⁄8

(1216)

577⁄8

(1470)

245⁄8

(625)

13⁄4

(44)

18

(457)

101⁄2

(267)

550

(249)

21 101⁄2

(267)

700

(318)

24 34

(864)

517⁄8

(1318)

617⁄8

(1572)

245⁄8

(625)

13⁄4

(44)

24

(610)

101⁄2

(267)

800

(363)

30 40

(1016)

577⁄8

(1470)

697⁄8

(1775)

271⁄4

(692)

13⁄4

(44)

30

(762)

101⁄2

(267)

950

(431)

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

9

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

Motor hp (Belt Drive only)

6 = 1/6 10 = 1 50 = 5

4 = 1/4 15 = 11⁄2 75 = 71⁄2

3 = 1/3 20 = 2 100 = 10

5 = 1/2 30 = 3 150 = 15

7 = 3/4

Motor RPM (Direct Drive only)

A = 1725

B = 1140

C = 860

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

9

OUTSIDE CURB DIMENSION

ROOF OPENING

2.5 INCH (57 MM)

EMBEDMENT

CURB HEIGHT

12, 18, OR 24 INCHES

(305, 457, or 610 MM)

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

MINIMUM CONCRETE

STRENGTH OF 3000 PSI

THROAT DIMENSION

(ROOF OPENING)

4 INCH (102 MM) TYPICAL

1.75 INCH (44 MM) 1.75 INCH (44 MM)

1.75 INCH (44 MM)

1 INCH (25 MM) INSULATION

2.25 INCH (57 MM) TYPICAL

4 INCH (102 MM)

MOUNTING FLANGE

TYPICAL

HILTI KB11, 3/8-16 X 3 ON

12 INCH (305 MM) MAXIMUM CENTERS.

MINIMUM TWO PER SIDE.

OUTSIDE FLANGE DIMENSION

OUTSIDE CURB DIMENSION

ROOF OPENING

CURB HEIGHT

12, 18, OR 24 INCHES

(305, 457, 610 MM)

THROAT DIMENSION

(ROOF OPENING)

6 X 3 INCH (152 x 76 mm)

STEEL MOUNTING ANGLE

(12 GAUGE MINIMUM)

ROOF TRUSS

CORRUGATED

ROOF DECK

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

CORNER TOP VIEW

4 INCH (102 MM) TYPICAL

1.75 INCH (44 MM) 1.75 INCH (44 MM)

1.75 INCH (44 MM)

1 INCH (25 MM) INSULATION

2.25 INCH (57 MM) TYPICAL

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

OUTSIDE FLANGE DIMENSION

Concrete

Steel

Severe Duty Curb

Installation Options

10

LD Dimensions

LDP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LD/LDP 60-75

Direct Drive

Model

Number

Motor

HP

Fan

RPM Watts CFM / Static Pressure in Inches wg

0 0.1 0.125 0.2 0.25 0.3 0.375 0.4 0.45 0.5

LD/LDP-60 1/60 1590* 51 W CFM 202 171 164 139 119 97

Sones 4.8 4.3 4.3 4.0 3.8 3.6

LD/LDP-65 1/30 1680* 70 W 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

LD/LDP-70 1/30 1665* 73 W 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

LD/LDP-75 1/25 1620* 79 W 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

17

(432)

131⁄2

(343)

17

(432)

22

(559)

27

(686)

13

(330)

2

(51)

17

(432)

17

(432)

23

(584)

23

(584)

111⁄2

(292)

0 50 100 150 200 250 300 350 400 450 500

0

20

40

60

80

100

120

140

0 50 100 150 200 250 300

0.0

0.1

0.2

0.3

0.4

0.5

0.6

Static Pressure in. wg

cfm

m3/hr

Static Pressure Pa

Size 60 and 65

RPM

Density 0.075 lb/ft3

LD/LDP-60

LD/LDP-65

131⁄2

(343)

0 100 200 300 400 500 600

0

20

40

60

80

100

120

140

0 50 100 150 200 250 300 350 400

0.0

0.1

0.2

0.3

0.4

0.5

0.6

Static Pressure in. wg

cfm

m3/hr

Static Pressure Pa

Size 70 and 75

RPM

Density 0.075 lb/ft3

LD/LDP-70

LD/LDP-75

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)

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.

11

LD Dimensions

LDP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LD/LDP 80-95

Direct Drive

Model

Number

Motor

HP

Fan

RPM Watts CFM / Static Pressure in Inches wg

0 0.1 0.125 0.2 0.25 0.3 0.375 0.5 0.6 0.625

LD/LDP-80 1/20 1550* 115 W CFM 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

LD/LDP-85 1/20 1500* 120 W 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

LD/LDP-90 1/15 1550* 92 W CFM 819 735 714 654 608 562 485 361

Sones 8.8 8.6 8.5 8.4 8.3 8.1 7.8 7.9

LD/LDP-95 1/8 1550* 160 W 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

19

(483)

131⁄2

(343)

19

(483)

28

(711)

27

(686)

16

(406)

4

(102)

19

(483)

19

(483)

25

(635)

25

(635)

121⁄2

(318)

0 200 400 600 800 1000

0

20

40

60

80

100

120

140

160

0 100 200 300 400 500 600

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

Static Pressure in. wg

cfm

m3/hr

Static Pressure Pa

Size 80 and 85

LD/LDP-80

RPM

Density 0.075 lb/ft3

LD/LDP-85

0 200 400 600 800 1000 1200 1400 1600 1800 2000

0

20

40

60

80

100

120

140

160

180

200

220

0 200 400 600 800 1000 1200

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Static Pressure in. wg

cfm

m3/hr

Static Pressure Pa

LD/LDP-90

Size 90 and 95

RPM

Density 0.075 lb/ft3

LD/LDP-95

161⁄2

(419)

LD 80 thru LD 95 LDP 80 thru LDP 95

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 10 (254) 10 (254)

Roof Opening Square 121⁄2 (318) 121⁄2 (318)

Weight* Galvanized, 45 (20) Aluminum, 63 (29)

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.

12

LD Dimensions

LDP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

0 500 1000 1500 2000 2500

0

50

100

150

200

250

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

Y

S

T

E

M

C

U

R

V

E

0 200 400 600 800 1000 1200 1400 1600

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

Static Pressure in. wg

cfm

m3/hr

Static Pressure Pa

RPM

Density 0.075 lb/ft3

Size 100

1725

1140

860

0 500 1000 1500 2000 2500 3000

0

50

100

150

200

250

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

Y

S

T

E

M

C

U

R

V

E

0 200 400 600 800 1000 1200 1400 1600 1800 2000

0.0

0.2

0.4

0.6

0.8

1.0

1.2

Static Pressure in. wg

cfm

m3/hr

Static Pressure Pa

Size 120

RPM

Density 0.075 lb/ft3

1725

1140

860

LD/LDP 100-120

Direct Drive

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.125 0.2 0.25 0.375 0.5 0.625 0.75 0.875 0.9

LD/LDP-100-C 1/8 860

CFM 766 568 407

BHP 0.022 0.029 0.028

Sones 6.3 5.3 5.1

LD/LDP-100-B 1/6 1140

CFM 1016 879 780 709 493

BHP 0.051 0.065 0.068 0.068 0.066

Sones 12.0 11.0 10.6 10.4 10.4

LD/LDP-100-A 1/4 1725

CFM 1538 1457 1399 1360 1256 1142 1024 891 724 678

BHP 0.18 0.21 0.22 0.22 0.23 0.24 0.24 0.23 0.23 0.22

Sones 16.2 14.8 14.4 14.2 14.3 14.2 14.8 15.3 15.9 16.1

LD/LDP-120-C 1/8 860

CFM 921 702 536

BHP 0.03 0.041 0.043

Sones 6.6 5.3 5.1

LD/LDP-120-B 1/6 1140

CFM 1221 1072 960 886 664

BHP 0.071 0.086 0.094 0.096 0.099

Sones 11.9 10.9 10.3 10.0 9.2

LD/LDP-120-A 1/4 1725

CFM 1848 1762 1693 1652 1540 1412 1286 1142 979 940

BHP 0.25 0.28 0.29 0.29 0.31 0.33 0.34 0.35 0.34 0.33

Sones 21 19.6 19.4 19.3 18.6 18.4 18.2 18.2 18.3 18.3

22

(559)

131⁄2

(343)

22

(559)

30

(762)

27

(686)

18

(457)

4

(102)

22

(559)

22

(559)

28

(711)

28

(711)

181⁄2

(470)

14

(356)

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)

Roof Opening Square 141⁄2 (368) 141⁄2 (368)

Weight* Galvanized, 57 (26) Aluminum, 82 (37)

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.

13

LB Dimensions

LBP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LB/LBP 10

Belt Drive

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1 1.125

LB/LBP-10-4 1/4

600

CFM 539 351

BHP 0.013 0.014

Sones 3.0 1.6

712

CFM 639 500

BHP 0.021 0.024

Sones 3.6 2.3

937

CFM 841 746 623

BHP 0.048 0.053 0.054

Sones 5.1 4.3 3.6

1049

CFM 942 855 759 625

BHP 0.067 0.073 0.076 0.075

Sones 5.9 5.3 4.7 4.2

1162

CFM 1043 963 887 780 618

BHP 0.091 0.097 0.103 0.103 0.099

Sones 6.9 6.3 5.9 5.4 4.7

1274

CFM 1144 1070 1004 917 818

BHP 0.12 0.13 0.13 0.14 0.14

Sones 8.0 7.5 7.1 6.8 6.3

1386

CFM 1244 1177 1114 1047 953 861

BHP 0.15 0.16 0.17 0.18 0.18 0.17

Sones 9.2 8.8 8.4 8.2 7.9 7.3

1499

CFM 1346 1283 1224 1168 1093 1006 910

BHP 0.19 0.2 0.21 0.22 0.22 0.22 0.22

Sones 10.0 9.8 9.5 9.3 8.8 8.3 7.8

1611

CFM 1446 1388 1331 1280 1220 1142 1064 970

BHP 0.24 0.25 0.26 0.27 0.28 0.28 0.28 0.27

Sones 11.2 10.9 10.7 10.4 10.1 9.5 9.0 8.5

LB/LBP-10-3 1/3

1689

CFM 1516 1461 1406 1356 1304 1237 1158 1087 980

BHP 0.28 0.29 0.3 0.31 0.32 0.32 0.32 0.32 0.31

Sones 12.2 11.9 11.6 11.3 11.0 10.6 9.9 9.5 8.9

1767

CFM 1587 1533 1480 1432 1385 1327 1254 1182 1112 997

BHP 0.32 0.33 0.34 0.35 0.36 0.36 0.36 0.36 0.36 0.36

Sones 13.5 13.0 12.6 12.2 11.9 11.7 11.0 10.5 10.1 9.5

MAX. BHP AT A GIVEN RPM - (rpm/2476)3

MAXIMUM FRPM = 1767

TIP SPEED = rpm x 2.913

MAX. MOTOR FRAME SIZE = 56

28

(711)

22

(559)

39

(991)

17

(432)

22

(559)

22

(559)

28

(711)

381⁄2

(978)

171⁄4

(438)

31⁄4

(85)

17

(432)

14

(356)

325⁄8

(829)

0 500 1000 1500 2000 2500

0

50

100

150

200

250

300

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

Y

S

T

E

M

C

U

R

V

E

0 200 400 600 800 1000 1200 1400 1600

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

Static Pressure in. wg

cfm

m3/hr

Static Pressure Pa

RPM

HP

Density 0.075 lb/ft3

1/4 hp

1767

1/3 hp

1534

1300

1067

833

600

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)

Weight* Galvanized,

56 (25)

Aluminum,

99 (45)

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.

14

LB Dimensions

LBP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LB/LBP 14

Belt Drive

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1 1.125

LB/LBP-14-4 1/4

480

CFM 903 614

BHP 0.022 0.025

Sones 4.1 3.2

564

CFM 1061 848

BHP 0.035 0.041

Sones 4.7 4.2

731

CFM 1375 1231 1024

BHP 0.077 0.086 0.089

Sones 5.9 5.6 5.1

815

CFM 1533 1402 1241 1013

BHP 0.11 0.12 0.12 0.12

Sones 6.7 6.4 5.9 5.4

899

CFM 1690 1574 1439 1264 946

BHP 0.14 0.15 0.16 0.17 0.15

Sones 7.5 7.3 6.9 6.4 5.7

982

CFM 1847 1743 1629 1482 1297

BHP 0.19 0.2 0.21 0.21 0.21

Sones 8.5 8.4 8 7.5 7

1066

CFM 2004 1912 1807 1681 1534 1351

BHP 0.24 0.25 0.26 0.27 0.28 0.27

Sones 9.8 9.7 9.4 8.9 8.4 7.8

LB/LBP-14-3 1/3

1118

CFM 2102 2016 1913 1801 1672 1512 1257

BHP 0.27 0.28 0.3 0.31 0.32 0.32 0.3

Sones 10.7 10.6 10.3 9.8 9.3 8.7 8.1

1170

CFM 2200 2120 2019 1920 1797 1657 1487

BHP 0.31 0.32 0.34 0.36 0.36 0.36 0.36

Sones 11.5 11.3 11.1 10.6 10.1 9.5 9.0

LB/LBP-14-5 1/2

1257

CFM 2364 2290 2197 2112 2002 1887 1748 1585

BHP 0.39 0.4 0.42 0.44 0.44 0.45 0.45 0.44

Sones 12.9 12.7 12.5 12.1 11.6 11.1 10.5 10.1

1343

CFM 2525 2456 2372 2289 2199 2092 1979 1848 1692 1386

BHP 0.47 0.49 0.51 0.53 0.54 0.55 0.55 0.55 0.54 0.51

Sones 14.4 14.1 13.8 13.5 13.1 12.6 12.2 11.6 11.1 10.4

MAX. BHP AT A GIVEN RPM - (rpm/1639)3

MAXIMUM FRPM = 1343

TIP SPEED = rpm x 3.829

MAX. MOTOR FRAME SIZE = 56

0 1000 2000 3000 4000

0

50

100

150

200

250

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

Y

S

T

E

M

C

U

R

V

E

0 300 600 900 1200 1500 1800 2100 2400 2700

0.0

0.2

0.4

0.6

0.8

1.0

1.2

Static Pressure in. wg

cfm

m3/hr

Static Pressure Pa

RPM

HP

Density 0.075 lb/ft3

1343

1170

997

825

652

480

1/3 hp

1/4 hp

1/2 hp

35

(889)

26

(660)

39

(991)

18

(457)

26

(660)

171⁄2

(445)

4

(102)

26

(660)

32

(813)

40

(1016)

17

(432)

16

(406)

26

(660)

LB-14 LBP-14

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 16 (406) 16 (406)

Roof Opening Square 181⁄2 (470) 181⁄2 (470)

Weight* Galvanized,

81 (37)

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.

15

LB Dimensions

LBP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LB/LBP 18

Belt Drive

0246810

0

200

400

600

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

Y

S

T

E

M

C

U

R

V

E

0 1000 2000 3000 4000 5000 6000

0.0

0.5

1.0

1.5

2.0

2.5

Static Pressure in. wg

cfm

m3/hr X 1000

Static Pressure Pa

1/4 hp

1/3 hp

1/2 hp

3/4 hp

1 hp

1 1/2 hp

2 hp

1460

RPM

HP

Density 0.075 lb/ft3

1261

1062

863

664

465

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.125 0.25 0.5 0.75 1 1.25 1.5 1.75 2

LB/LBP-18-4 1/4

465

CFM 1753 1422

BHP 0.056 0.064

Sones 3.6 2.7

562

CFM 2119 1871 1522

BHP 0.099 0.108 0.114

Sones 4.9 4.1 3.4

755

CFM 2847 2671 2474 1925

BHP 0.24 0.25 0.27 0.27

Sones 8.7 7.9 7.4 6.5

LB/LBP-18-3 1/3 826

CFM 3115 2957 2778 2324

BHP 0.31 0.33 0.34 0.36

Sones 10.2 9.5 8.9 8.0

LB/LBP-18-5 1/2

888

CFM 3348 3203 3039 2638 2110

BHP 0.39 0.4 0.42 0.45 0.44

Sones 11.7 11.0 10.4 9.4 8.7

949

CFM 3578 3442 3292 2936 2498

BHP 0.48 0.49 0.51 0.54 0.55

Sones 13.4 13.0 12.0 11.0 10.3

LB/LBP-18-7 3/4 1085

CFM 4091 3972 3847 3575 3218 2822

BHP 0.71 0.73 0.75 0.79 0.82 0.82

Sones 16.8 16.2 15.5 14.6 13.4 12.9

LB/LBP-18-10 1 1141

CFM 4302 4189 4073 3814 3493 3140 2674

BHP 0.83 0.84 0.86 0.91 0.94 0.96 0.93

Sones 18.0 17.3 16.7 15.9 14.8 14.1 13.8

LB/LBP-18-15 11⁄2

1286

CFM 4849 4749 4648 4423 4183 3880 3568 3208

BHP 1.19 1.2 1.22 1.27 1.32 1.35 1.37 1.35

Sones 21 20 19.8 19.2 18.5 17.8 17.4 17.1

1375

CFM 5185 5091 4997 4790 4576 4311 4025 3719 3382

BHP 1.45 1.47 1.49 1.54 1.59 1.63 1.66 1.67 1.65

Sones 24 23 22 21 21 20 19.9 19.6 19.5

LB/LBP-18-20 2 1460

CFM 5505 5417 5328 5138 4936 4714 4446 4176 3874 3538

BHP 1.73 1.76 1.78 1.83 1.88 1.93 1.98 2 2 1.97

Sones 26 25 24 23 23 22 22 22 22 22

MAX. BHP AT A GIVEN RPM - (rpm/1157)3

MAXIMUM FRPM = 1460

TIP SPEED = rpm x 4.843

MAX. MOTOR FRAME SIZE = 145T

30

(762)

39

(991)

21

(533)

171⁄2

(445)

41⁄2

(114)

36

(914)

46

(1168)

241⁄2

(622)

19

(483)

40

(1016)

30

(762)

30

(762) 30

(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)

Weight* Galvanized,

135 (61)

Aluminum,

179 (81)

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.

16

LB Dimensions

LBP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LB/LBP 21

Belt Drive

0 2 4 6 8 10 12

0

100

200

300

400

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

Y

S

T

E

M

C

U

R

V

E

0 1000 2000 3000 4000 5000 6000 7000 8000

0.0

0.5

1.0

1.5

2.0

Static Pressure in. wg

cfm

m3/hr X 1000

Static Pressure Pa

1200

1053

906

612

465

1 1/2 hp

1/4 hp

1/3 hp

1/2 hp

3/4 hp

1 hp

2 hp

RPM

HP

Density 0.075 lb/ft3

759

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.25 0.375 0.5 0.625 0.75 1 1.25 1.5 1.75

LB/LBP-21-4 1/4

465

CFM 2820 1732

BHP 0.12 0.13

Sones 6.6 5.2

595

CFM 3609 2938 2457

BHP 0.24 0.28 0.28

Sones 8.8 7.8 6.9

LB/LBP-21-3 1/3 651

CFM 3948 3371 2970 2354

BHP 0.32 0.36 0.36 0.34

Sones 10.1 8.8 8.2 6.9

LB/LBP-21-5 1/2

699

CFM 4239 3724 3362 2954 1964

BHP 0.39 0.44 0.45 0.45 0.38

Sones 11.6 9.9 9.3 8.6 7.1

747

CFM 4531 4056 3741 3390 2909

BHP 0.48 0.53 0.54 0.55 0.53

Sones 13.4 11.2 10.4 9.8 9.1

LB/LBP-21-7 3/4

801

CFM 4858 4424 4157 3833 3491 2937

BHP 0.59 0.65 0.66 0.67 0.68 0.64

Sones 15.5 12.9 11.8 11.3 10.8 10.1

855

CFM 5186 4790 4553 4261 3954 3608

BHP 0.72 0.79 0.8 0.81 0.82 0.82

Sones 16.7 14.4 13.3 12.8 12.1 11.5

LB/LBP-21-10 1 899

CFM 5452 5087 4858 4602 4313 4019 2894

BHP 0.83 0.91 0.93 0.94 0.95 0.96 0.86

Sones 17.1 15.4 14.5 13.9 13.4 12.7 11.7

LB/LBP-21-15 11⁄2

1010

CFM 6126 5826 5614 5415 5183 4926 4386 3369

BHP 1.18 1.26 1.3 1.32 1.34 1.35 1.36 1.24

Sones 20 18.9 18.1 17.3 16.6 16.2 15.0 14.0

1077

CFM 6532 6260 6068 5877 5691 5451 4965 4395

BHP 1.43 1.52 1.56 1.59 1.61 1.62 1.65 1.63

Sones 22 21 20 19.4 18.8 18.2 17.3 16.4

LB/LBP-21-20 2 1200

CFM 7278 7034 6890 6712 6542 6375 5954 5517 5013 4122

BHP 1.98 2.07 2.12 2.18 2.2 2.22 2.25 2.28 2.26 2.11

Sones 26 25 25 24 23 23 22 21 20 18.5

MAX. BHP AT A GIVEN RPM - (rpm/910)3

MAXIMUM FRPM = 1200

TIP SPEED = rpm x 5.596

MAX. MOTOR FRAME SIZE = 145T

30

(762)

51

(1295)

23

(584)

23

(584)

6

(152)

36

(914)

46

(1168)

241⁄2

(622)

19

(483)

43

(1092)

30

(762)

30

(762)

30

(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)

Weight* Galvanized,

145 (66)

Aluminum,

191 (86)

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.

17

LB Dimensions

LBP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LB/LBP 24

Belt Drive

02468101214

0

50

100

150

200

250

300

350

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

Y

S

T

E

M

C

U

R

V

E

0 1000 2000 3000 4000 5000 6000 7000 8000 9000

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

Static Pressure in. wg

cfm

m3/hr X 1000

Static Pressure Pa

1 1/2 hp

2 hp

1 hp

3/4 hp

1/2 hp

1/3 hp

1/4 hp

910

799

688

577

466

355

RPM

HP

Density 0.075 lb/ft3

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.25 0.375 0.5 0.625 0.75 0.875 1 1.25 1.375

LB/LBP-24-4 1/4

355

CFM 3419

BHP 0.11

Sones 5.8

409

CFM 3938 2715

BHP 0.17 0.19

Sones 6.3 5.1

462

CFM 4449 3451 2491

BHP 0.24 0.28 0.25

Sones 7.4 6.3 5.3

LB/LBP-24-3 1/3 508

CFM 4892 4043 3433

BHP 0.32 0.36 0.36

Sones 8.5 7.4 6.8

LB/LBP-24-5 1/2 582

CFM 5604 4917 4441 3899

BHP 0.48 0.54 0.55 0.55

Sones 10.7 9.4 8.9 8.4

LB/LBP-24-7 3/4

625

CFM 6018 5381 4988 4497 3929

BHP 0.59 0.66 0.68 0.68 0.66

Sones 12.4 11.0 10.3 10.0 9.5

667

CFM 6423 5828 5505 5062 4589 3984

BHP 0.72 0.8 0.82 0.83 0.83 0.79

Sones 14.1 12.7 12.0 11.5 11.1 10.9

LB/LBP-24-10 1 734

CFM 7068 6531 6252 5912 5503 5073 4555

BHP 0.96 1.05 1.08 1.1 1.1 1.1 1.07

Sones 17.0 15.3 14.6 13.9 13.5 13.2 12.9

LB/LBP-24-15 11⁄2787

CFM 7578 7080 6820 6560 6190 5799 5398 4909

BHP 1.18 1.29 1.32 1.35 1.36 1.36 1.36 1.32

Sones 19.6 17.4 16.5 15.9 15.4 15.0 14.8 14.1

LB/LBP-24-20 2

868

CFM 8358 7907 7675 7440 7192 6855 6505 6141 5285

BHP 1.58 1.7 1.74 1.78 1.81 1.82 1.83 1.82 1.76

Sones 24 21 20 19.4 18.9 18.3 17.9 17.6 16.0

910

CFM 8763 8333 8114 7889 7664 7377 7056 6713 5995 5537

BHP 1.82 1.95 2 2.04 2.07 2.09 2.1 2.1 2.08 2.03

Sones 27 24 23 21 21 20 19.8 19.5 18.4 17.2

451⁄2

(1156)

MAX. BHP AT A GIVEN RPM - (rpm/710)3

MAXIMUM FRPM = 910

TIP SPEED = rpm x 6.414

MAX. MOTOR FRAME SIZE = 145T

34

(864)

51

(1295)

231⁄2

(597)

201⁄2

(521)

63⁄4

(171)

40

(1016)

491⁄2

(1257)

20

(508)

34

(864)

34

(864)

34

(864)

231⁄2

(597)

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)

Weight* Galvanized,

188 (85)

Aluminum,

239 (108)

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.

18

LB Dimensions

LBP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LB/LBP 30

Belt Drive

0 5 10 15 20 25

0

100

200

300

400

0 2 4 6 8 10 12 14 16

0.0

0.5

1.0

1.5

2.0

Static Pressure in. wg

cfm X 1000

m3/hr X 1000

Static Pressure Pa

1 1/2 hp

1/3 hp

1/2 hp

3/4 hp

1 hp

2 hp

3 hp

RPM

HP

Density 0.075 lb/ft3

5 hp

835

714

230

351

472

593

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

Y

S

T

E

M

C

U

R

V

E

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.25 0.375 0.5 0.625 0.75 1 1.25 1.5 1.75

LB/LBP-30-3 1/3

230

CFM 3910

BHP 0.076

Sones 8.0

366

CFM 6221 4729

BHP 0.31 0.37

Sones 8.7 5.9

LB/LBP-30-5 1/2

394

CFM 6697 5354 4290

BHP 0.38 0.45 0.44

Sones 9.0 6.5 6.0

421

CFM 7156 5939 5076

BHP 0.47 0.54 0.55

Sones 9.7 7.4 6.7

LB/LBP-30-7 3/4 483

CFM 8210 7196 6567 5777

BHP 0.7 0.8 0.83 0.83

Sones 12.0 10.7 9.7 8.8

LB/LBP-30-10 1 529

CFM 8992 8079 7559 6946 6162

BHP 0.92 1.04 1.07 1.1 1.09

Sones 13.8 12.9 12.1 11.4 10.3

LB/LBP-30-15 11⁄2

567

CFM 9638 8797 8334 7786 7174 6410

BHP 1.14 1.27 1.31 1.34 1.36 1.33

Sones 15.3 14.2 13.6 13.0 12.3 11.2

605

CFM 10284 9507 9073 8605 8068 7434

BHP 1.38 1.53 1.57 1.61 1.64 1.64

Sones 16.8 15.7 15.2 14.6 14.1 13.3

LB/LBP-30-20 2 667

CFM 11338 10639 10257 9863 9419 8933 7737

BHP 1.85 2.02 2.07 2.12 2.16 2.19 2.17

Sones 19.8 18.6 17.9 17.5 17.1 16.6 14.9

LB/LBP-30-30 3 703

CFM 11950 11287 10935 10562 10184 9722 8701 7032

BHP 2.17 2.34 2.41 2.46 2.51 2.54 2.57 2.41

Sones 22 20 19.5 19.1 18.7 18.3 17.0 14.2

LB/LBP-30-50 5 835

CFM 14194 13635 13356 13062 12747 12432 11728 10951 9965 8478

BHP 3.63 3.84 3.95 4.03 4.09 4.14 4.24 4.33 4.29 4.06

Sones 27 26 25 25 24 24 23 22 21 18.2

MAX. BHP AT A GIVEN RPM - (rpm/512)3

MAXIMUM FRPM = 835

TIP SPEED = rpm x 7.985

MAX. MOTOR FRAME SIZE = 184T

50

(1270)

40

(1016)

63

(1600)

265⁄8

(676)

291⁄2

(749)

81⁄2

(216)

46

(1168)

58

(1473)

23

(584)

40

(1016)

40

(1016)

40

(1016)

261⁄2

(673)

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)

Weight* Galvanized,

249 (113)

Aluminum,

318 (144)

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.

19

LB Dimensions

LBP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LB/LBP 36

Belt Drive

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.25 0.375 0.5 0.625 0.75 0.875 1 1.25 1.5

LB/LBP-36-5 1/2

220

CFM 6204

BHP 0.16

Sones 4.9

315

CFM 8884 6937

BHP 0.47 0.55

Sones 8.2 6.3

LB/LBP-36-7 3/4 360

CFM 10153 8570 7487

BHP 0.7 0.81 0.83

Sones 10.6 8.9 7.9

LB/LBP-36-10 1 397

CFM 11196 9816 8911 7775

BHP 0.94 1.08 1.1 1.1

Sones 13.7 12.1 10.6 9.4

LB/LBP-36-15 11⁄2

426

CFM 12014 10765 9964 9056 7716

BHP 1.16 1.32 1.35 1.37 1.34

Sones 14.8 14.0 12.7 11.6 10.1

454

CFM 12804 11668 10949 10127 9209 7552

BHP 1.41 1.58 1.63 1.65 1.66 1.57

Sones 16.0 15.4 14.5 13.7 12.5 11.0

LB/LBP-36-20 2 499

CFM 14073 13064 12442 11760 11004 10173 8773

BHP 1.87 2.06 2.13 2.17 2.2 2.2 2.12

Sones 18.2 17.6 17.2 16.6 16.1 15.1 13.9

LB/LBP-36-30 3

536

CFM 15116 14196 13646 13037 12361 11652 10837 9559

BHP 2.31 2.52 2.61 2.67 2.7 2.73 2.72 2.65

Sones 20 19.7 19.3 18.7 18.4 17.8 16.7 15.8

572

CFM 16132 15287 14790 14229 13649 12989 12313 11534

BHP 2.81 3.04 3.14 3.21 3.26 3.29 3.32 3.31

Sones 22 22 21 21 20 19.9 19.0 18.1

LB/LBP-36-50 5

614

CFM 17316 16540 16087 15598 15066 14504 13890 13262 11584

BHP 3.48 3.72 3.84 3.93 3.99 4.05 4.08 4.1 4.04

Sones 25 24 24 24 23 23 22 21 19.2

678

CFM 19121 18419 18041 17621 17165 16683 16192 15636 14494 12970

BHP 4.69 4.95 5.08 5.21 5.3 5.37 5.44 5.47 5.52 5.45

Sones 30 29 29 29 28 27 27 26 24 22

MAX. BHP AT A GIVEN RPM - (rpm/384)3

MAXIMUM FRPM = 678

TIP SPEED = rpm x 9.425

MAX. MOTOR FRAME SIZE = 184T

60

(1524)

46

(1168)

63

(1600)

325⁄8

(829)

27

(686)

93⁄4

(248)

513⁄4

(1314)

63

(1600)

26

(660)

46

(1168)

46

(1168)

46

(1168)

343⁄8

(873)

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)

Weight* Galvanized,

338 (153)

Aluminum,

444 (201)

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.

0 10 20 30

0

100

200

300

400

0 2 4 6 8 10 12 14 16 18 20

0.0

0.5

1.0

1.5

2.0

Static Pressure in. wg

cfm X 1000

m3/hr X 1000

Static Pressure Pa

RPM

HP

Density 0.075 lb/ft3

1 1/2 hp

3/4 hp

1 hp

1/2 hp

2 hp

3 hp

5 hp

678

586

494

403

311

220

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

IS

SY

S

T

E

M

C

U

R

V

E

20

LB Dimensions

LBP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LB/LBP 42

Belt Drive

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1 1.25

LB/LBP-42-5 1/2

190

CFM 8328 6455

BHP 0.21 0.25

Sones 5.2 4.3

247

CFM 10827 9583 7772

BHP 0.47 0.53 0.55

Sones 6.9 6.0 5.5

LB/LBP-42-7 3/4 283

CFM 12405 11362 9965 7932

BHP 0.71 0.78 0.83 0.81

Sones 8.3 7.6 7.1 6.5

LB/LBP-42-10 1 311

CFM 13632 12718 11521 10057

BHP 0.94 1.02 1.08 1.1

Sones 9.8 9.3 8.7 8.3

LB/LBP-42-15 11⁄2

334

CFM 14640 13812 12766 11480 9795

BHP 1.17 1.25 1.33 1.37 1.35

Sones 11.5 11.0 10.4 9.8 9.2

356

CFM 15605 14828 13887 12733 11417 9401

BHP 1.41 1.5 1.58 1.64 1.66 1.59

Sones 13.2 12.7 12.1 11.5 10.8 10.3

LB/LBP-42-20 2 392

CFM 17183 16477 15667 14715 13626 12382 10481

BHP 1.89 1.98 2.08 2.16 2.21 2.21 2.13

Sones 16.1 15.5 14.9 14.3 13.7 13.2 12.9

LB/LBP-42-30 3

420

CFM 18410 17751 17030 16205 15201 14135 12945 11013

BHP 2.32 2.42 2.52 2.62 2.68 2.72 2.72 2.61

Sones 18.6 18.0 17.3 16.6 16.1 15.4 15.3 15.2

448

CFM 19637 19020 18378 17605 16740 15786 14735 13494

BHP 2.82 2.93 3.04 3.14 3.22 3.28 3.3 3.28

Sones 22 21 20 19.4 18.8 18.1 17.5 17.6

LB/LBP-42-50 5

482

CFM 21128 20554 19980 19281 18562 17683 16796 15798 14692

BHP 3.51 3.63 3.74 3.86 3.97 4.04 4.1 4.11 4.09

Sones 23 23 22 22 21 20 19.3 18.7 18.5

515

CFM 22574 22037 21500 20887 20214 19480 18651 17822 16871 14331

BHP 4.28 4.41 4.53 4.65 4.77 4.87 4.94 5.01 5.01 4.88

Sones 25 24 24 24 23 22 21 21 20 19.3

0 10203040

0

100

200

300

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

YS

T

E

M

C

U

R

V

E

0 2 4 6 8 10 12 14 16 18 20 22 24

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

Static Pressure in. wg

cfm X 1000

m3/hr X 1000

Static Pressure Pa

5 hp

3 hp

2 hp

1 1/2 hp

1 hp

3/4 hp

1/2 hp

515

450

385

320

255

190

RPM

HP

Density 0.075 lb/ft3

MAX. BHP AT A GIVEN RPM - (rpm/301)3

MAXIMUM FRPM = 515

TIP SPEED = rpm x 11.061

MAX. MOTOR FRAME SIZE = 184T

705⁄8

(1794)

52

(1321)

75

(1905)

373⁄8

(949)

331⁄2

(851)

111⁄2

(292)

58

(1473)

701⁄2

(1791)

29

(737)

52

(1321)

52

(1321)

52

(1321)

381⁄4

(972)

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)

Weight* Galvanized,

396 (180)

Aluminum,

530 (240)

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.

21

LB Dimensions

LBP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LB/LBP 48

Belt Drive

0 10203040

0

50

100

150

200

250

300

D

O

N

OT

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

Y

S

T

E

M

C

U

R

V

E

0 4 8 12 16 20 24 28

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

Static Pressure in. wg

cfm X 1000

m3/hr X 1000

Static Pressure Pa

5 hp

3 hp

2 hp

1 1/2 hp

1 hp

3/4 hp

1/2 hp

420

366

312

258

204

150

RPM

HP

Density 0.075 lb/ft3

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 0.9 1

LB/LBP-48-5 1/2

150

CFM 9666 6546

BHP 0.21 0.24

Sones 6.1 5.4

175

CFM 11277 8948

BHP 0.34 0.38

Sones 6.9 5.6

199

CFM 12824 10846 7629

BHP 0.5 0.56 0.54

Sones 7.6 6.8 7.0

LB/LBP-48-7 3/4 226

CFM 14563 12863 10741

BHP 0.73 0.81 0.83

Sones 8.5 8.2 7.5

LB/LBP-48-10 1 249

CFM 16046 14530 12787 10092

BHP 0.98 1.07 1.1 1.08

Sones 9.5 9.4 9.2 8.3

LB/LBP-48-15 11⁄2

267

CFM 17205 15823 14222 12151

BHP 1.2 1.31 1.35 1.36

Sones 10.6 10.4 10.2 9.2

285

CFM 18365 17103 15612 13896 11357

BHP 1.46 1.58 1.63 1.66 1.61

Sones 12.3 11.7 11.1 10.5 9.6

LB/LBP-48-20 2 314

CFM 20234 19141 17779 16397 14665 11934

BHP 1.96 2.1 2.17 2.2 2.22 2.1

Sones 15.4 14.5 13.4 12.5 12.2 11.5

LB/LBP-48-30 3 359

CFM 23134 22214 21041 19878 18650 17134 15069 11596

BHP 2.93 3.1 3.21 3.25 3.29 3.31 3.25 2.84

Sones 18.4 17.8 17.2 16.5 15.9 15.5 14.8 13.4

LB/LBP-48-50 5

381

CFM 24552 23685 22620 21512 20378 19104 17564 15491 15076

BHP 3.5 3.68 3.81 3.87 3.92 3.95 3.95 3.86 3.85

Sones 20 19.6 19.1 18.6 17.9 17.4 17.1 16.2 16.0

420

CFM 27065 26278 25383 24354 23363 22317 21159 19839 19534 18029

BHP 4.69 4.89 5.05 5.15 5.21 5.25 5.29 5.31 5.3 5.23

Sones 23 23 23 23 22 22 21 21 21 20

MAX. BHP AT A GIVEN RPM - (rpm/241)3

MAXIMUM FRPM = 420

TIP SPEED = rpm x 12.632

MAX. MOTOR FRAME SIZE = 213T

703⁄8

(1788)

58

(1473)

87

(2210)

411⁄2

(1054)

41

(1041)

115⁄8

(295)

64

(1626)

761⁄2

(1943)

32

(813)

58

(1473)

58

(1473)

58

(1473)

403⁄8

(1026)

LB-48 LBP-48

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 48 (1219) 48 (1219)

Roof Opening Square 501⁄2 (1283) 501⁄2 (1283)

Weight* Galvanized,

430 (195)

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.

22

LB Dimensions

LBP Dimensions

13⁄4

(44)

13⁄4

(44)

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.

LB/LBP 54

Belt Drive

0 102030405060

0

50

100

150

200

250

300

D

O

N

O

T

S

E

L

E

C

T

T

O

T

H

E

L

E

F

T

O

F

T

H

I

S

S

Y

S

T

E

M

C

U

R

V

E

0 5 10 15 20 25 30 35 40

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

Static Pressure in. wg

cfm X 1000

m3/hr X 1000

Static Pressure Pa

RPM

HP

Density 0.075 lb/ft3

7 1/2 hp

5 hp

3 hp

2 hp

1 hp

1 1/2 hp

401

348

293

239

184

130

Model

Number

Motor

HP

Fan

RPM

CFM / Static Pressure in Inches wg

0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1 1.125

LB/LBP-54-10 1

130

CFM 12159

BHP 0.25

Sones 4.6

155

CFM 14497 11186

BHP 0.42 0.48

Sones 5.8 4.9

206

CFM 19267 17356 13895

BHP 0.99 1.1 1.12

Sones 8.7 8.5 8.7

LB/LBP-54-15 11⁄2235

CFM 21980 20319 17983 14194

BHP 1.47 1.6 1.66 1.6

Sones 11.2 11.2 11.3 11.7

LB/LBP-54-20 2 258

CFM 24131 22628 20831 17904

BHP 1.95 2.09 2.18 2.21

Sones 12.1 12.5 13.0 13.3

LB/LBP-54-30 3

277

CFM 25908 24517 22962 20554 17326

BHP 2.41 2.57 2.68 2.72 2.65

Sones 14.1 13.4 14.1 14.4 13.7

296

CFM 27685 26383 25030 23122 20394 16072

BHP 2.94 3.11 3.25 3.31 3.34 3.1

Sones 17.6 15.5 15.2 16.0 15.1 13.1

LB/LBP-54-50 5

323

CFM 30210 29017 27789 26305 24165 21535 17215

BHP 3.82 4.01 4.17 4.27 4.31 4.29 4.01

Sones 19.3 17.8 17.3 18.4 18.3 16.8 14.7

350

CFM 32736 31634 30514 29312 27766 25487 22974 18944

BHP 4.87 5.06 5.25 5.39 5.46 5.5 5.43 5.13

Sones 18.9 19.5 20 21 22 21 19.0 17.8

LB/LBP-54-75 71⁄2

376

CFM 35167 34142 33111 32039 30716 29030 26889 24483 20824

BHP 6.03 6.25 6.45 6.62 6.72 6.79 6.82 6.71 6.4

Sones 22 23 23 24 25 26 24 22 21

401

CFM 37506 36544 35583 34583 33500 32150 30332 28324 26018 22767

BHP 7.32 7.54 7.77 7.96 8.11 8.19 8.24 8.29 8.13 7.81

Sones 25 26 26 27 28 29 29 27 26 24

MAX. BHP AT A GIVEN RPM - (rpm/198)3

MAXIMUM FRPM = 401

TIP SPEED = rpm x 14.137

MAX. MOTOR FRAME SIZE = 213T

791⁄2

(2019)

64

(1626)

87

(2210)

453⁄8

(1153)

38

(965)

121⁄2

(318)

70

(1778)

831⁄2

(2121)

35

(889)

64

(1626)

64

(1626) 64

(1626)

435⁄8

(1108)

LB-54 LBP-54

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 54 (1372) 54 (1372)

Roof Opening Square 561⁄2 (1435) 561⁄2 (1435)

Weight* Galvanized,

596 (270)

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.

23

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.

Specifications

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

Building Value in Air

Our Warranty

Prepared to Support

Green Building Efforts

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 air-

related 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.

Catalog Series L Rev 4 April 2008 R

Copyright © 2008 Greenheck Fan Corp.

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).

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.

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.