| Item | Downblast Ventilator |
| Assembled/unassembled | Unassembled |
| Assembly | Unassembled |
| Base Dia. | Not Applicable |
| Base Height | 1 3/4" |
| Base Length | 30" |
| Base Shape | Square |
| Base Size | 30" x 30" |
| Base Width | 30" |
| Bearing Type | Regreasable Pillow Block |
| Brake Hp | 11/20 hp |
| Dimension A | 30" |
| Dimension B | 35 1/2" |
| Dimension C | 34 3/8" |
| Dimension D | 5 1/2" |
| Drive Package Included | Yes |
| Drive Package With Motor Included | Yes |
| Drive Type | Belt Drive |
| Duty Rating | Hazardous Location |
| Electrical Connection | Power Cord |
| Features | Nonoverloading Centrifugal Wheel Design |
| For Air Type | Flammable Vapor |
| For High-static Pressure Applications | No |
| High-efficiency Motor | No |
| Housing Length | 35 1/2" |
| Housing Material | Aluminum , Spun |
| Housing Width | 35 1/2" |
| Includes | Hazardous Location Motor |
| Includes Drive Package | Yes |
| Includes Motor | Yes |
| Max. Bhp | 0.55 bhp |
| Max. Inlet Temp. | 180°F |
| Motor Hp | 1/2 hp |
| Motor Location | Out Of Airstream |
| Motor Voltage | 115/208-230V |
| Mount Type | Roof Curb |
| Mounting Location | Roof |
| Overall Dia. | 35 1/2" |
| Overall Height | 29 3/4" , 36 1/8" |
| Overall Length | 35 1/2" |
| Overall Width | 35 1/2" |
| Phase | 1 |
| Propeller Shaft Dia. | 3/4" |
| Resistance Properties | Weather Resistant |
| Safety Features | Birdscreen |
| Shaft Dia. Sheave End | 3/4" |
| Shaft Dia. Wheel End | 3/4" |
| Sones @ 0.250-in. Sp @ 5 Ft. | 10.7 sones |
| Sones @ 0.500-in. Sp @ 5 Ft. | 9.8 sones |
| Speed Control | No |
| Wheel Dia. | 21 1/2" |
| Wheel Material | Aluminum |
| Wheel Type | Backward Inclined , Centrifugal Backward Inclined |
| Application | Industrial And Commercial Applications |
| Brake Horsepower | 11/20 bhp |
| Compatible Curb Grainger Part Number | 2RB79, 2ZV83, 3C437, 4C454, 4HX41, 4HX49 |
| Compatible Damper Grainger Part Number | 4HX67 |
| Current | 8.8/4.2-4.4A |
| Damper Size | 23" x 23" |
| Exhaust Airflow @ 0.000 In Sp | 4261 CFM |
| Exhaust Airflow @ 0.125 In Sp | 4013 CFM |
| Exhaust Airflow @ 0.250 In Sp | 3744 CFM |
| Exhaust Airflow @ 0.375 In Sp | 3477 CFM |
| Exhaust Airflow @ 0.500 In Sp | 3141 CFM |
| Frequency | 60 Hz |
| Hazardous Location Specification | Class I Group C, Class I Group D, Class II Group E, Class II Group F, Class II Group F |
| Housing Material Fabrication | Spun |
| Includes Drive Package With Motor | Yes |
| Maximum Fan Speed | 770 RPM |
| Maximum Inlet Air Temperature | 180°F |
| Maximum Static Pressure | 5/8 in. wc |
| Motor Enclosure | Totally Enclosed Fan Cooled |
| Motor Horsepower | 1/2 hp |
| Motor Speed | 1725 RPM |
| Nameplate Voltage | 115/208-230V AC |
| Number Of Speeds | 1 |
| Overall Diameter | 35 1/2" |
| Sound Level | 10.2 sones @ 0.375 in SP and 5 ft, 10.7 sones @ 0.250 in SP and 5 ft, 11.0 sones @ 0.125 in SP and 5 ft, 12.1 sones @ 0.000 in SP and 5 ft, 9.3 sones @ 0.625 in SP and 5 ft, 9.8 sones @ 0.500 in SP and 5 ft |
| Speed Controllable | No |
| Standards | AMCA SOUND AND AIR, UL |
| Wheel Diameter | 21 1/2" |
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