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Roof Downblast - Exhaust
Belt Drive
GB-360
58
3
⁄
4
(1492)
46
(1168)
Damper Size = 36 x 36
(914 x 914)
Roof Opening = 38½ x 38½
(978 x 978)
Shroud Thickness = 0.080
(2.0)
Motor Cover Thickness = 0.064
Curb Cap Thickness = 0.080
(2.0)
^Approximate Unit Weight = 415 lbs.
All dimensions in inches (millimeters). *May be greater depending on
motor. ^Weight shown is largest cataloged Open Drip-Proof motor.
Motor
Fan
HP
RPM
360
8024
CFM
300
0.40
BHP
7.6
Sones
1/2
8693
CFM
325
BHP
0.51
8.7
Sones
CFM
9763
3/4
365
BHP
0.72
Sones
10.8
10966
CFM
1
410
1.02
BHP
Sones
13.7
12304
CFM
1
1
⁄
460
1.45
BHP
2
15.9
Sones
CFM
12919
483
BHP
1.67
Sones
17.0
2
CFM
13507
505
BHP
1.91
Sones
18.1
14524
CFM
543
2.38
BHP
20
Sones
3
15513
CFM
580
2.90
BHP
22
Sones
CFM
16931
633
BHP
3.77
Sones
26
5
CFM
18322
685
BHP
4.77
Sones
30
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
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.
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.
Values shown are for installation type A: free inlet hemispherical sone levels.
*38
1
⁄
2
(978)
8
7
⁄
(225)
8
1
3
⁄
(44)
4
(1.6)
(188 kg)
0
0.125
0.25
0.375
7070
5804
0.43
0.44
6.6
5.6
7830
6756
5001
0.54
0.56
7.7
6.8
9024
8109
7013
0.76
0.79
10.0
8.9
10330
9558
8686
1.07
1.11
13.3
11.9
11737
11085
10360
1.50
1.55
15.6
14.8
12379
11776
11109
1.73
1.78
16.7
16.1
12991
12431
11795
1.97
2.02
17.8
17.3
14043
13551
12959
2.44
2.5
19.8
19.4
15064
14614
14077
2.96
3.03
22
22
16519
16107
15654
3.84
3.91
25
25
17941
17560
17179
4.85
4.93
30
29
Static Pressure in Inches wg
0.5
0.625
MAXIMUM BHP AT A GIVEN RPM = (RPM/394)
TIP SPEED (ft/min) = RPM x 9.425
0.51
MAXIMUM MOTOR FRAME SIZE = 215T
5.6
0.78
7.9
7641
1.12
1.11
10.9
9.6
9568
8607
1.58
1.59
1.56
14.1
13.1
12.1
10355
9517
1.82
1.83
1.83
15.5
14.8
13.7
11096
10368
2.07
2.09
2.10
16.8
16.5
15.5
12350
11679
2.55
2.59
2.60
18.9
18.6
17.8
13523
12917
3.09
3.14
3.17
21
21
20
15146
14639
3.98
4.04
4.10
24
24
23
16711
16243
5.01
5.07
5.14
29
28
28
RPM (Belt)
HP
Density 0.075 lb/ft
Density 1.2 kg/m
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0.75
1
1.25
MAXIMUM RPM = 685
7096
1.46
10.9
8488
1.78
12.9
9473
2.07
14.7
10965
8917
2.60
2.46
16.9
15.6
12289
10813
3.18
3.13
19.1
17.6
14072
12892
11465
4.12
4.13
4.05
23
21
19.7
15774
14710
13535
5.20
5.23
5.21
26
24
23
3
3
1.5
3
12119
5.10
22
41
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