Roof Downblast - Exhaust Belt Drive
GB-420
651⁄4
(1657)
*44 |
|
(1118) | Pressure(Pa) |
93⁄4 (248) | |
13⁄4 (44) | Static |
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52
(1321)
Damper Size = 42 x 42 (1067 x 1067) Roof Opening = 441/2 x 441/2 (1130 x 1130) Shroud Thickness = 0.080 (2.0)
Motor Cover Thickness = 0.064 (1.6) Curb Cap Thickness = 0.100 (2.5) ^Approximate Unit Weight = 495 lbs. (225 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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| HP |
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| Density 0.075 lb/ft3 |
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| Density 1.2 kg/m3 |
wg) |
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| R | V | E |
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Pressure |
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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..50 | 0..625 | 0..75 | 1..00 | 1..25 |
| 1..5 |
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420 |
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| CFM | 8242 | 6454 |
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| 200 |
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| BHP |
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1/2 |
| Sones | 3..1 | 2..9 |
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| MAXIMUM RPM = 600 |
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| CFM | 9890 | 8573 | 6365 |
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| TIP SPEED (ft/min) = RPM x 11.061 |
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| 240 | BHP | 0..46 | 0..50 | 0..48 |
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| MAXIMUM MOTOR FRAME SIZE = 215T |
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| Sones | 4..6 | 5..0 | 4..9 |
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| CFM | 11332 | 10219 | 8698 |
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3/4 | 275 | BHP | 0..69 | 0..75 | 0..76 |
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| Sones | 6..2 | 6..8 | 5..6 |
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| CFM | 12568 | 11579 | 10320 | 8672 |
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1 | 305 | BHP | 0..95 | 1..01 | 1..03 | 1..01 |
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| Sones | 8..0 | 8..4 | 7..5 | 7..2 |
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| CFM | 14217 | 13357 | 12411 | 11102 | 9463 |
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11⁄2 | 345 | BHP | 1..37 | 1..45 | 1..49 | 1..50 | 1..45 |
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| Sones | 11..7 | 11..3 | 10..8 | 10..1 | 9..6 |
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| CFM | 15659 | 14892 | 14043 | 12983 | 11787 | 10108 |
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2 | 380 | BHP | 1..83 | 1..92 | 1..97 | 2..00 | 2..00 | 1..91 |
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| Sones | 14..4 | 13..8 | 13..3 | 12..7 | 12..3 | 12..0 |
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| CFM | 17925 | 17264 | 16540 | 15792 | 14790 | 13764 |
| 12502 |
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3 | 435 | BHP | 2..74 | 2..86 | 2..93 | 2..97 | 2..99 | 3..00 |
| 2..95 |
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| Sones | 19..0 | 18..4 | 17..8 | 17..3 | 16..6 | 16..4 |
| 16..5 |
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| CFM | 19574 | 18968 | 18320 | 17640 | 16887 | 15929 |
| 14994 | 12315 |
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| 475 | BHP | 3..57 | 3..69 | 3..78 | 3..84 | 3..88 | 3..90 |
| 3..91 | 3..69 |
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5 |
| Sones | 22 | 21 | 20 | 19..8 | 19..3 | 18..6 |
| 18..3 | 18..3 |
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| CFM | 21222 | 20663 | 20081 | 19459 | 18826 | 18046 |
| 17162 | 15254 | 12312 |
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| 515 | BHP | 4..55 | 4..68 | 4..80 | 4..87 | 4..92 | 4..95 |
| 4..98 | 4..92 | 4..56 |
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| Sones | 24 | 24 | 23 | 22 | 21 | 21 |
| 20 | 19..4 | 19..1 |
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| CFM | 22994 | 22478 | 21957 | 21383 | 20805 | 20219 |
| 19446 | 17835 | 15908 |
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| 558 | BHP | 5..79 | 5..93 | 6..07 | 6..15 | 6..22 | 6..28 |
| 6..31 | 6..34 | 6..21 |
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71⁄2 |
| Sones | 27 | 27 | 26 | 25 | 24 | 24 |
| 23 | 23 | 22 |
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| CFM | 24725 | 24245 | 23765 | 23243 | 22709 | 22166 |
| 21621 | 20104 | 18585 |
| 16590 |
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| 600 | BHP | 7..20 | 7..35 | 7..51 | 7..61 | 7..70 | 7..76 |
| 7..81 | 7..87 | 7..86 |
| 7..64 |
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| Sones | 30 | 30 | 30 | 29 | 27 | 27 |
| 26 | 26 | 26 |
| 26 |
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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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