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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 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)
38
1
⁄2
(978)
17
1
⁄4
(438)
3
1
⁄4
(85)
17
(432)
14
(356)
32
5
⁄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
m
3
/hr
Static Pressure Pa
RPM
HP
Density 0.075 lb/ft
3
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 14
1
⁄2 (368) 14
1
⁄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.