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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 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
m
3
/hr
Static Pressure Pa
RPM
HP
Density 0.075 lb/ft
3
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)
17
1
⁄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 18
1
⁄2 (470) 18
1
⁄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.