Greenheck Fan Centrifugal Roof Downblast Exhaust Fans GB User Manual
Page 27
27
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. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: free inlet hemispherical sone levels.
0
2000
4000
6000
8000
0
100
200
300
400
500
600
0
1000
2000
3000
4000
5000
0.0
0.5
1.0
1.5
2.0
2.5
163-A
163-B
2 HP
1.5 H
P
1 HP
3/4 H
P
1/2 H
P
1/3 H
P
1/4 H
P
1725
1575
1375
1250
945
1140
860
Static Pr
essur
e (in. wg)
Volume (cfm)
163-C
Volume (m
3
/hr)
Static Pr
essur
e (Pa)
RPM
(Belt)
RPM
(Direct)
RPM
(Vari-Green)
HP
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
D
O
N
O
T
S
E
LE
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
IS
S
Y
S
T
E
M
C
U
R
V
E
Roof Downblast - Exhaust
Belt & Direct Drive
GB-161 • G-163
Damper Size = 16 x 16
Roof Opening = 18½ x 18½
(470 x 470)
Shroud Thickness = 0.051
(1.3)
Motor Cover Thickness = 0.040
(1.0)
Curb Cap Thickness = 0.064
(1.6)
^Approximate Unit Weight G/GB = 101/88 lbs.
(46/40 kg)
All dimensions in inches (millimeters). *May be greater depending on
motor. ^Weight shown is largest cataloged Open Drip-Proof motor.
1
3
⁄
4
(44)
28
3
⁄
8
(619)
4
(102)
*23
3
⁄
4
(603)
22
(559)
Motor HP
Fan
RPM
Static Pressure in Inches wg
Belt
Direct
0
0.125
0.25
0.375
0.5
0.75
0.875
1
1.25
1.5
161
163
1/4
VG-1
580
CFM
1713
1417
970
BHP
0.07
0.08
0.07
Sones
5.8
5.6
5.3
720
CFM
2127
1893
1632
1243
BHP
0.14
0.15
0.15
0.14
Sones
7.8
7.5
7.2
6.8
C-1/4
860
CFM
2540
2344
2145
1913
1596
BHP
0.23
0.24
0.25
0.26
0.24
Sones
10.5
10.0
9.6
9.3
8.7
1/3
945
CFM
2791
2612
2434
2236
2010
BHP
0.31
0.32
0.33
0.34
0.34
Sones
12.6
12.0
11.5
11.2
10.7
1/2
1100
CFM
3249
3095
2943
2787
2615
2198
1900
BHP
0.48
0.50
0.52
0.53
0.53
0.52
0.50
Sones
15.3
14.7
14.1
13.8
13.5
12.5
12.0
3/4
B-1/2
1140
CFM
3367
3219
3072
2922
2761
2382
2125
1808
BHP
0.54
0.56
0.57
0.58
0.59
0.59
0.57
0.54
Sones
15.9
15.4
14.9
14.5
14.2
13.3
12.9
12.1
1200
CFM
3545
3403
3263
3123
2977
2641
2429
2167
BHP
0.63
0.65
0.66
0.68
0.69
0.69
0.68
0.66
Sones
17.0
16.5
16.0
15.6
15.3
14.6
14.1
13.7
VG-2
1250
CFM
3692
3557
3422
3289
3149
2838
2658
2444
BHP
0.71
0.73
0.75
0.76
0.77
0.79
0.78
0.76
Sones
17.9
17.4
17.0
16.6
16.3
15.6
15.2
14.9
1
1375
CFM
4062
3938
3815
3694
3571
3304
3161
3007
2609
2073
BHP
0.95
0.97
0.99
1.01
1.02
1.04
1.05
1.04
1.01
0.93
Sones
21
20
19.6
19.2
18.9
18.4
18.0
17.6
17.2
15.4
1
1
⁄
2
1575
CFM
4652
4545
4437
4330
4225
4007
3894
3769
3512
3198
BHP
1.42
1.45
1.47
1.49
1.51
1.54
1.56
1.56
1.57
1.54
Sones
26
25
25
24
24
24
23
23
22
22
A-2
1725
CFM
5095
4997
4899
4800
4704
4510
4409
4308
4082
3845
BHP
1.87
1.89
1.92
1.94
1.97
2.01
2.03
2.04
2.06
2.06
Sones
30
30
30
29
29
28
28
28
27
26
C-860
-
RPM
B-1140
-
RPM
A-1725
-
RPM
MAXIMUM BHP AT A GIVEN RPM = (RPM/1355)
3
MAXIMUM RPM - GB-161=1575, G-163=1725
TIP SPEED (ft/min) = RPM x 4.352
MAXIMUM MOTOR FRAME SIZE = 145T
Direct Drive RPM