Roof Downblast - Exhaust Belt Drive
GB-220
423⁄4
(1086)
*311⁄2 | (Pa) |
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(800) | Pressure |
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53⁄4 (146) | Static |
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13⁄4 (44) |
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34
(864)
Damper Size = 24 x 24 (610 x 610) Roof Opening = 261/2 x 261/2 (673 x 673) Shroud Thickness = 0.064 (1.6) Motor Cover Thickness = 0.040 (1.0) Curb Cap Thickness = 0.064 (1.6) ^Approximate Unit Weight = 164 lbs. (74 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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| U | |
Pressure |
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| M | C |
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| S | Y | S |
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Static |
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| T | H | I |
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| F | T |
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| T | H | E |
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Volume (cfm x 1000)
Volume (m3/hr x 1000)
Motor | Fan |
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| Static Pressure in Inches wg |
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HP | RPM |
| 0 | 0..125 | 0..25 | 0..375 | 0..5 |
| 0..625 | 0..75 | 1 | 1..25 |
| 1..5 |
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220 |
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| CFM | 3230 | 2879 | 2296 |
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| 425 | BHP | 0..14 | 0..16 | 0..16 |
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| MAXIMUM BHP AT A GIVEN RPM = (RPM/782)3 |
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| Sones | 7..4 | 7..2 | 6..9 |
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| MAXIMUM RPM = 985 |
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1/4 | 465 | CFM | 3533 | 3219 | 2758 | 1951 |
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| TIP SPEED (ft/min) = RPM x 6.283 |
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BHP | 0..18 | 0..20 | 0..21 | 0..19 |
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| MAXIMUM MOTOR FRAME SIZE = 184T |
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| Sones | 8..1 | 7..8 | 7..4 | 7..0 |
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| CFM | 3799 | 3512 | 3132 | 2542 |
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| 500 | BHP | 0..23 | 0..25 | 0..26 | 0..26 |
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| Sones | 8..8 | 8..4 | 7..9 | 7..5 |
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| CFM | 4179 | 3924 | 3629 | 3158 | 2526 |
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1/3 | 550 | BHP | 0..30 | 0..32 | 0..34 | 0..35 | 0..33 |
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| Sones | 10..0 | 9..6 | 8..9 | 8..4 | 8..0 |
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| CFM | 4863 | 4654 | 4403 | 4120 | 3702 |
| 3208 |
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1/2 | 640 | BHP | 0..48 | 0..50 | 0..53 | 0..54 | 0..55 |
| 0..54 |
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| Sones | 13..0 | 12..8 | 12..1 | 11..2 | 10..5 |
| 9..7 |
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| CFM | 5395 | 5206 | 4990 | 4762 | 4459 |
| 4077 |
| 3633 |
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3/4 | 710 | BHP | 0..65 | 0..68 | 0..71 | 0..73 | 0..74 |
| 0..75 |
| 0..74 |
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| Sones | 15..0 | 14..9 | 14..4 | 13..6 | 12..8 |
| 12..1 |
| 11..2 |
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| CFM | 5737 | 5559 | 5362 | 5148 | 4920 |
| 4579 |
| 4206 | 3095 |
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| 755 | BHP | 0..79 | 0..82 | 0..84 | 0..87 | 0..89 |
| 0..90 |
| 0..90 | 0..82 |
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1 |
| Sones | 15..7 | 15..6 | 15..2 | 14..6 | 14..0 |
| 13..4 |
| 12..7 | 11..2 |
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| CFM | 6079 | 5911 | 5732 | 5530 | 5326 |
| 5049 |
| 4716 | 3929 |
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| 800 | BHP | 0..93 | 0..97 | 1..00 | 1..02 | 1..05 |
| 1..06 |
| 1..07 | 1..05 |
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| Sones | 16..6 | 16..4 | 16..1 | 15..6 | 15..2 |
| 14..6 |
| 14..2 | 12..5 |
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| CFM | 6444 | 6286 | 6122 | 5932 | 5741 |
| 5540 |
| 5236 | 4566 | 3542 |
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| 848 | BHP | 1..11 | 1..15 | 1..18 | 1..21 | 1..23 |
| 1..26 |
| 1..27 | 1..27 | 1..17 |
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11⁄2 |
| Sones | 17..8 | 17..5 | 17..2 | 16..9 | 16..5 |
| 16..2 |
| 15..7 | 14..5 | 13..4 |
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| CFM | 6801 | 6651 | 6501 | 6323 | 6142 |
| 5960 |
| 5723 | 5122 | 4401 |
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| 895 | BHP | 1..31 | 1..34 | 1..38 | 1..41 | 1..44 |
| 1..47 |
| 1..49 | 1..50 | 1..47 |
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| Sones | 19..4 | 19..1 | 18..8 | 18..5 | 18..2 |
| 18..0 |
| 17..6 | 16..9 | 15..5 |
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| CFM | 7485 | 7349 | 7212 | 7062 | 6898 |
| 6734 |
| 6568 | 6107 | 5548 |
| 4883 |
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2 | 985 | BHP | 1..74 | 1..78 | 1..82 | 1..86 | 1..89 |
| 1..92 |
| 1..95 | 1..99 | 2..00 |
| 1..96 |
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| Sones | 23 | 23 | 23 | 22 | 22 |
| 22 |
| 22 | 21 | 20 |
| 19..0 |
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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.
33