Roof Downblast - Exhaust
Belt & Direct Drive
GB-200 • G-203
351⁄2
(902)
30
(762)
*28
(711)
51⁄2 (140)
13⁄4 (44)
Static Pressure (Pa)
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| RPM (Belt) |
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| RPM (Direct) |
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| HP |
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| Density | 0.075 lb/ft3 |
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| Density 1.2 kg/m3 | |
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wg) |
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(in. |
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Pressure |
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| Y |
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| T | O |
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Static |
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| H | E | L |
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| T | T |
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| N |
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| D |
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Damper Size = 18 x 18 (457 x 457) Roof Opening = 201/2 x 201/2 (521 x 521) Shroud Thickness = 0.064 (1.6) Motor Cover Thickness = 0.040 (1.0) Curb Cap Thickness = 0.064 (1.6)
^Approximate Unit Weight G/GB = 119/144 lbs. (54/65 kg)
All dimensions in inches (millimeters).. *May be greater depending on motor. ^Weight shown is largest cataloged Open
Volume (cfm)
Volume (m3 /hr )
Direct Drive RPM
Motor HP | Fan |
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| Static Pressure in Inches wg |
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Belt |
| Direct | RPM |
| 0 | 0..125 | 0..25 | 0..375 | 0..5 | 0..75 | 1..0 | 1..25 | 1..5 |
| 1..75 | ||
200 |
| 203 |
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| 440 | CFM | 2435 | 1976 |
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| BHP | 0..1 | 0..1 |
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| MAXIMUM BHP AT A GIVEN RPM = (RPM/938)3 |
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1/4 |
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| Sones | 6..5 | 5..8 |
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| MAXIMUM RPM = 1200 |
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| CFM | 3320 | 2984 | 2637 | 2089 |
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| TIP SPEED (ft/min) = RPM x 5.596 |
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| 600 | BHP | 0..25 | 0..26 | 0..26 | 0..25 |
| MAXIMUM MOTOR FRAME SIZE = 184T |
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| Sones | 8..5 | 7..9 | 7..3 | 6..1 |
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| CFM | 3680 | 3378 | 3085 | 2706 | 2087 |
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1/3 |
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| 665 | BHP | 0..34 | 0..34 | 0..35 | 0..35 | 0..33 |
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| Sones | 9..6 | 9 | 8..5 | 7..7 | 6..7 |
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| CFM | 3973 | 3700 | 3422 | 3109 | 2684 |
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| 718 | BHP | 0..43 | 0..43 | 0..45 | 0..45 | 0..44 |
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1/2 |
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| Sones | 10..8 | 10 | 9..6 | 9 | 8..3 |
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| CFM | 4261 | 4013 | 3744 | 3477 | 3141 |
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| 770 | BHP | 0..52 | 0..53 | 0..55 | 0..55 | 0..55 |
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| Sones | 12..1 | 11 | 10..7 | 10..2 | 9..8 |
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| CFM | 4759 | 4548 | 4289 | 4068 | 3811 | 3085 |
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3/4 |
| 860 | BHP | 0..73 | 0..74 | 0..75 | 0..77 | 0..77 | 0..74 |
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| Sones | 14..1 | 13..3 | 12..9 | 12..4 | 11..8 | 11..1 |
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| CFM | 5340 | 5158 | 4927 | 4720 | 4520 | 4015 |
| 3240 |
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1 |
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| 965 | BHP | 1..03 | 1..04 | 1..05 | 1..08 | 1..09 | 1..08 |
| 1..02 |
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| Sones | 16..7 | 16 | 15..4 | 15 | 14..5 | 13..7 |
| 13 |
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| CFM | 5689 | 5517 | 5309 | 5101 | 4918 | 4488 |
| 3911 | 2941 |
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| 1028 | BHP | 1..25 | 1..26 | 1..27 | 1..29 | 1..31 | 1..32 |
| 1..28 | 1..14 |
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| Sones | 18..5 | 17..8 | 17..2 | 16..8 | 16..4 | 15..6 |
| 14..7 | 14..6 |
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| CFM | 6032 | 5870 | 5682 | 5473 | 5301 | 4925 |
| 4450 | 3751 |
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| 1090 | BHP | 1..49 | 1..5 | 1..51 | 1..52 | 1..56 | 1..56 |
| 1..56 | 1..48 |
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| Sones | 20 | 19..6 | 18..9 | 18..4 | 18..1 | 17..5 |
| 16..8 | 15..8 |
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| CFM | 6308 | 6154 | 5980 | 5779 | 5606 | 5267 |
| 4832 | 4287 | 3439 |
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| 1140 | BHP | 1..7 | 1..71 | 1..72 | 1..74 | 1..77 | 1..79 |
| 1..79 | 1..75 | 1..61 |
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2 |
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| Sones | 22 | 21 | 21 | 20 | 19..7 | 19..1 |
| 18..5 | 17..5 | 16..5 |
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| CFM | 6640 | 6494 | 6336 | 6145 | 5969 | 5651 |
| 5274 | 4829 | 4177 |
| 3077 | ||
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| 1200 | BHP | 1..99 | 2 | 2..01 | 2..02 | 2..04 | 2..09 |
| 2..09 | 2..08 | 1..99 |
| 1..69 | |
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| Sones | 24 | 23 | 23 | 22 | 22 | 21 |
| 21 | 19..9 | 18..6 |
| 16..7 | |
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.
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