Natural ventilation cooling system using modern technology and engineering. Installing a modern whole house fan by QuietAir Fans can significantly reduce your air conditioning bills. If you live in an area with hot days and cool nights， stop throwing money away on air conditioning and save by drawing the cool night air into your home. This is not the old belt drive， loud， noisy and vibrating whole house fan of the past. QuietAir Fans use acoustical ducting for quieter operation. An R-5 foam insulated gravity damper isolates the living area from the attic when the system is not operating. Easy Installation. Unlike older style whole house fans， QuietAir Fans are designed and engineered to fit between 16 in. and 24 in. on-center joists， no additional framing is required.
QA-3300(R) is designed to cool 1-story homes up to 900 sq. ft. and 2-story homes up to 1450 sq. ft.
10-year Fan Motor Warranty
3300 CFM
2425 HVI-916 CFM
415-Watts， 2-speed PSC motor ensures efficient operation and airflow
2-speed wall switch with digital timer (1-hour， 2-hours， 4-hours， 8-hours) included
R-5 foam insulated gravity damper box
Acoustical ducting for a quieter operation
Heavy-duty fan motor bracket with rubber bushings prevents motor from shifting and reduces noise and vibration
Heavy-duty metal fan guard with 6-points of contact for a stronger and more stable fan housing
Fits between 16 in. or 24 in. on center joists， no joist-cutting required
Installation typically takes just a few hours
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