Roof Downblast - Exhaust Belt Drive
GB-180HP
351⁄2
(902)
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| *28 | |||||||||
| (711) | Pressure | ||||||||
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| 51⁄2 (140) |
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| Static | |||
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| 13⁄4 (44) | |||||||
30
(762)
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 = 142 lbs. (64 kg)
All dimensions in inches (millimeters).. *May be greater depending on motor. ^Weight shown is largest cataloged Open
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| RPM (Belt) |
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| Density | 0.075 lb/ft3 |
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| Density 1.2 kg/m3 | |
wg) |
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(in. |
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| M | C |
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Pressure |
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| T |
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| Y | S |
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| S | S |
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| F | T | H |
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| T | T |
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Volume (cfm)
Volume (m3/hr )
Motor | Fan |
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| Static Pressure in Inches wg |
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HP | RPM |
| 0..5 | 0..75 | 1 | 1..25 | 1..5 |
| 1..75 | 2 | 2..25 | 2..5 |
| 2..75 |
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180HP |
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| CFM | 1547 |
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| 795 | BHP | 0..22 |
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| MAXIMUM BHP AT A GIVEN RPM = (RPM/1325)3 |
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1/4 |
| Sones | 8..6 |
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| MAXIMUM RPM = 1700 |
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845 | CFM | 1759 |
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| TIP SPEED (ft/min) = RPM x 4.843 |
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| BHP | 0..26 |
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| MAXIMUM MOTOR FRAME SIZE = 184T |
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| Sones | 9..1 |
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| CFM | 2114 | 1686 |
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1/3 | 935 | BHP | 0..35 | 0..35 |
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| Sones | 10..3 | 9..6 |
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| CFM | 2601 | 2316 | 1920 |
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1/2 | 1075 | BHP | 0..51 | 0..53 | 0..52 |
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| Sones | 12..9 | 12..1 | 11..6 |
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| CFM | 2847 | 2607 | 2298 | 1811 |
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| 1150 | BHP | 0..61 | 0..64 | 0..65 | 0..62 |
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3/4 |
| Sones | 14..6 | 13..1 | 12..6 | 12..3 |
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| CFM | 3088 | 2880 | 2610 | 2277 | 1711 |
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| 1225 | BHP | 0..73 | 0..77 | 0..78 | 0..78 | 0..72 |
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| Sones | 16..3 | 14..7 | 13..9 | 13..3 | 13..2 |
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| CFM | 3485 | 3296 | 3095 | 2840 | 2540 |
| 2059 |
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1 | 1350 | BHP | 0..96 | 1..00 | 1..04 | 1..05 | 1..05 |
| 0..99 |
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| Sones | 19..5 | 17..6 | 16..4 | 15..8 | 15..0 |
| 15..1 |
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| CFM | 3782 | 3604 | 3428 | 3213 | 2969 |
| 2670 |
| 2216 |
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| 1445 | BHP | 1..16 | 1..21 | 1..25 | 1..28 | 1..29 |
| 1..28 |
| 1..21 |
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11⁄2 |
| Sones | 22 | 20 | 18..8 | 17..8 | 17..3 |
| 16..4 |
| 16..6 |
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| CFM | 4076 | 3909 | 3744 | 3576 | 3353 |
| 3119 |
| 2827 | 2407 |
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| 1540 | BHP | 1..39 | 1..44 | 1..49 | 1..53 | 1..55 |
| 1..56 |
| 1..55 | 1..48 |
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| Sones | 25 | 22 | 21 | 20 | 19..6 |
| 18..9 |
| 18..1 | 18..3 |
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| CFM | 4319 | 4163 | 4005 | 3848 | 3663 |
| 3450 |
| 3223 | 2923 | 2512 |
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| 1620 | BHP | 1..60 | 1..66 | 1..71 | 1..76 | 1..79 |
| 1..81 |
| 1..82 | 1..80 | 1..72 |
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2 |
| Sones | 27 | 25 | 24 | 23 | 22 |
| 21 |
| 20 | 19..7 | 19..8 |
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| CFM | 4560 | 4414 | 4263 | 4114 | 3964 |
| 3764 |
| 3560 | 3340 | 3037 |
| 2642 |
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| 1700 | BHP | 1..84 | 1..90 | 1..96 | 2..01 | 2..06 |
| 2..08 |
| 2..10 | 2..11 | 2..07 |
| 1..99 |
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| Sones | 30 | 27 | 26 | 25 | 24 |
| 23 |
| 22 | 22 | 21 |
| 21 |
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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.
30