Downblast Vent, Belt Drive, 21-1/2 In
| Item - Roof Ventilators | Downblast Ventilator |
|---|---|
| Drive Package With Motor Included | Yes |
| Duty Rating - Roof Ventilators | Standard |
| Drive Type - Roof Ventilators | Belt Drive |
| Mounting Location - Roof Ventilators | Roof |
| Number of Speeds | 1 |
| Voltage - Roof Ventilators | 208V AC/230V AC/460V AC |
| Motor HP - Roof Ventilators | 0.75 HP |
| Base Size - Roof Ventilators | 30 in x 30 in |
| CFM @ 0.000-In. SP | 4,759 |
| CFM @ 0.625-In. SP | 3,504 |
| Agency Compliance | AMCA Sound & Air, UL/cUL 705 |
| Includes | Drive Package, NEMA 1 Junction Box |
| Drive Package Included | Yes |
| RPM | 860 |
| Base Width | 30 in |
| CFM @ 0.875-In. SP | 2,459 |
| Phase | 3 |
| Sones @ 0.500-In. SP @ 5 Ft. | 11.8 |
| Dimension D | 5-1/2 in |
| Dimension B | 35-1/2 in |
| CFM @ 0.500-In. SP | 3,811 |
| CFM @ 0.375-In. SP | 4,068 |
| Hz | 60 |
| Drive Type | Belt Drive |
| Recommended 8 In. Fixed Curb Item No. | 4HX41 |
| Speed Controllable | No |
| CFM @ 0.125-In. SP | 4,548 |
| Adj. 6 3/8"H Roof Curb Stock No. | 4c454 |
| Mounting Location | Roof |
| Motor HP | 0.75 |
| Shaft Dia. Wheel End | 3/4 in |
| Item | Centrifugal Downblast Roof Exhaust Fan |
| Overall Height | 36-1/8 in |
| Sones @ 0.250-In. SP @ 5 Ft. | 12.9 |
| Adj. 12 3/8"H Roof Curb Stock No. | 3C437 |
| Housing Material | Aluminum |
| Motor Voltage | 208/230/460 |
| CFM @ 0.750-In. SP | 3,085 |
| Base Length | 30 in |
| Wheel Type | Backward Inclined |
| Recommended 12 In. Fixed Curb Item No. | 4HX49 |
| Base Square Size - Roof Ventilators | 30" x 30" |
| Dimension C | 34-3/8 in |
| Overall Dia. | 35-1/2 in |
| Assembled/Unassembled | Unassembled |
| Wheel Material | Aluminum |
| Max. BHP | 0.77 |
| Sones @ 0.125-In. SP @ 5 Ft. | 13.3 |
| CFM @ 0.250-In. SP | 4,289 |
| Base Height | 1-3/4 in |
| Max. Inlet Temp. | 180 deg F |
| Dimension A | 30 in |
| Wheel Dia. | 21-1/2 in |
| Standards | AMCA Sound and Air, UL/cUL 705 |
| Bearing Type | Regreasable Pillow Block |
| Exhaust Airflow @ 0.125 in SP | 4,548 cfm |
| High-Efficiency Motor | No |
| Maximum Fan Speed | 860 RPM |
| Motor Horsepower | 0.75 HP |
| Resistance Properties | Weather Resistant |
| Electrical Connection | Power Cord |
| Brake Horsepower | 77/100 hp |
| Motor Enclosure | Open Dripproof |
| Overall Width | 35-1/2 in |
| Housing Length | 35-1/2 in |
| Overall Diameter | 35-1/2 in |
| Damper Size | 23 in x 23 in |
| Airflow @ 0.000 in SP | 4,759 cfm |
| Wheel Diameter | 21-1/2 in |
| Overall Length | 35-1/2 in |
| Nameplate Voltage | 208-230/440V AC |
| Propeller Shaft Diameter | 3/4 in |
| For Air Type | Clean Air |
| Spark Resistant Construction Type | A |
| Housing Material Fabrication | Spun |
| Includes Drive Package | Yes |
| Application | Industrial and Commercial Applications |
| Motor Location | Out of Airstream |
| Maximum Static Pressure | 0.875 in wc |
| Base Shape | Square |
| Mount Type | Roof Curb |
| Features | Fully Rolled Windband Bead for Increased Stability and Easy Transport, NEMA 1 Junction Box Located in Motor Enclosure |
| For High-Static Pressure Applications | No |
| Compatible Curb Manufacturer Part Number | 2RB79, 2ZV83, 3C437, 4C454, 4HX41, 4HX49 |
| Exhaust Airflow @ 0.375 in SP | 4,068 cfm |
| Exhaust Airflow @ 0.000 in SP | 4,759 cfm |
| Housing Width | 35-1/2 in |
| Frequency | 60 Hz |
| Maximum Inlet Air Temperature | 180 deg F |
| Safety Features | Birdscreen, Windband |
| Includes Motor | Yes |
| Assembly | Unassembled |
| Exhaust Airflow @ 0.250 in SP | 4,289 cfm |
| Sound Level | 11.1 sones @ 0.750 in SP and 5 ft, 11.4 sones @ 0.625 in SP and 5 ft, 11.4 sones @ 0.875 in SP and 5 ft, 11.8 sones @ 0.500 in SP and 5 ft, 12.4 sones @ 0.375 in SP and 5 ft, 12.9 sones @ 0.250 in SP and 5 ft, 13.3 sones @ 0.125 in SP and 5 ft, 14.1 sones @ 0.000 in SP and 5 ft |
| Exhaust Airflow @ 0.500 in SP | 3,811 cfm |
| Base Diameter | Not Applicable |
| Country of Origin (subject to change) | Multiple |
| Package Quantity | 1 |