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LD Dimensions
LDP 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.
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
m
3
/hr
Static Pressure Pa
RPM
Density 0.075 lb/ft
3
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
m
3
/hr
Static Pressure Pa
Size 120
RPM
Density 0.075 lb/ft
3
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)
13
1
⁄2
(343)
22
(559)
30
(762)
27
(686)
18
(457)
4
(102)
22
(559)
22
(559)
28
(711)
28
(711)
18
1
⁄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 14
1
⁄2 (368) 14
1
⁄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.