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LB Dimensions
LBP Dimensions
1
3
⁄4
(44)
1
3
⁄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
m
3
/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/ft
3
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 1
1
⁄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)
26
5
⁄8
(676)
29
1
⁄2
(749)
8
1
⁄2
(216)
46
(1168)
58
(1473)
23
(584)
40
(1016)
40
(1016)
40
(1016)
26
1
⁄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 32
1
⁄2 (826) 32
1
⁄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.