Roof Downblast - Exhaust Belt Drive
GB-330
583⁄4
(1492)
*381⁄2 | (Pa) |
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(978) | Pressure |
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87⁄8 (225) | Static |
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13⁄4 (44) |
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46
(1168)
Damper Size = 36 x 36 (914 x 914) Roof Opening = 381/2 x 381/2 (978 x 978) Shroud Thickness = 0.080 (2.0) Motor Cover Thickness = 0.064 (1.6) Curb Cap Thickness = 0.080 (2.0) ^Approximate Unit Weight = 385 lbs. (175 kg)
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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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| M | C |
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Pressure |
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| S | S |
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| F | T | H |
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Volume (cfm x 1000)
Volume (m3/hr x 1000)
All dimensions in inches (millimeters).. *May be greater depending on motor. ^Weight shown is largest cataloged Open
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..75 | 1 | 1..25 | 1..5 |
| 1..75 |
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330 |
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| CFM | 6159 | 5043 | 3236 |
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| 255 | BHP | 0..22 | 0..25 | 0..22 |
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| MAXIMUM BHP AT A GIVEN RPM = (RPM/405)3 |
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| Sones | 5..2 | 4..9 | 4..8 |
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1/3 |
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| MAXIMUM RPM = 700 |
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275 | CFM | 6643 | 5633 | 4308 |
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| TIP SPEED (ft/min) = RPM x 9.425 |
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| BHP | 0..28 | 0..31 | 0..31 |
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| MAXIMUM MOTOR FRAME SIZE = 215T |
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| Sones | 5..9 | 5..5 | 5..2 |
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| CFM | 7850 | 7029 | 6036 | 4757 |
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1/2 | 325 | BHP | 0..46 | 0..50 | 0..52 | 0..50 |
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| Sones | 8..5 | 8..3 | 7..4 | 7..1 |
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| CFM | 8937 | 8232 | 7410 | 6480 | 5257 |
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3/4 | 370 | BHP | 0..68 | 0..73 | 0..76 | 0..76 | 0..72 |
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| Sones | 10..2 | 9..8 | 9..2 | 8..4 | 8..3 |
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| CFM | 10024 | 9401 | 8713 | 7927 | 7050 |
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1 | 415 | BHP | 0..95 | 1..01 | 1..06 | 1..07 | 1..07 |
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| Sones | 12..6 | 11..9 | 11..3 | 10..6 | 10..0 |
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| CFM | 11232 | 10683 | 10087 | 9425 | 8706 | 6966 |
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11⁄2 | 465 | BHP | 1..34 | 1..40 | 1..46 | 1..50 | 1..51 | 1..46 |
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| Sones | 15..1 | 14..6 | 14..0 | 13..4 | 12..8 | 11..7 |
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| CFM | 12319 | 11824 | 11294 | 10719 | 10085 | 8696 | 6472 |
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2 | 510 | BHP | 1..77 | 1..84 | 1..91 | 1..96 | 1..98 | 1..99 | 1..79 |
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| Sones | 17..7 | 17..2 | 16..6 | 16..1 | 15..6 | 14..4 | 13..9 |
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| CFM | 13285 | 12828 | 12340 | 11822 | 11266 | 10041 | 8616 |
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| 550 | BHP | 2..22 | 2..29 | 2..37 | 2..43 | 2..47 | 2..51 | 2..46 |
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3 |
| Sones | 19..6 | 19..2 | 18..7 | 18..2 | 17..7 | 16..7 | 15..7 |
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| CFM | 14251 | 13825 | 13376 | 12908 | 12408 | 11307 | 10081 | 8536 |
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| 590 | BHP | 2..74 | 2..82 | 2..90 | 2..98 | 3..03 | 3..09 | 3..08 | 2..95 |
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| Sones | 22 | 21 | 21 | 20 | 19..8 | 18..8 | 17..7 | 17..1 |
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| CFM | 15580 | 15190 | 14786 | 14366 | 13922 | 12958 | 11912 | 10749 | 9292 |
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| 645 | BHP | 3..57 | 3..66 | 3..75 | 3..84 | 3..91 | 4..00 | 4..04 | 4..01 | 3..85 |
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5 |
| Sones | 24 | 24 | 24 | 23 | 23 | 22 | 21 | 20 | 19..4 |
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| CFM | 16908 | 16549 | 16185 | 15798 | 15408 | 14564 | 13624 | 12640 | 11538 |
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| 700 | BHP | 4..57 | 4..66 | 4..761 | 4..86 | 4..95 | 5..08 | 5..14 | 5..17 | 5..12 |
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| Sones | 28 | 27 | 27 | 27 | 27 | 26 | 25 | 24 | 23 |
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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.
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