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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 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 1
1
⁄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
Y
S
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
m
3
/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/ft
3
MAX. BHP AT A GIVEN RPM - (rpm/301)
3
MAXIMUM FRPM = 515
TIP SPEED = rpm x 11.061
MAX. MOTOR FRAME SIZE = 184T
70
5
⁄8
(1794)
52
(1321)
75
(1905)
37
3
⁄8
(949)
33
1
⁄2
(851)
11
1
⁄2
(292)
58
(1473)
70
1
⁄2
(1791)
29
(737)
52
(1321)
52
(1321)
52
(1321)
38
1
⁄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 44
1
⁄2 (1130) 44
1
⁄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.