Natural ventilation cooling system using modern technology and engineering. Installing a QA-Deluxe whole house fan 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. QA-Deluxe whole house fans use acoustical ducting for quieter operation. An R-5 insulated gravity damper isolates the living area from the attic when the system is not operating. Easy Installation. Unlike older style whole house fans， QA-Deluxe Fans are designed and engineered to fit between 16 in. and 24 in. on-center joists， no additional framing is required.
QA-deluxe 6500 is designed to cool 1-story homes up to 3000 sq. ft. and 2-story homes up to 4400 sq. ft.
10-year fan motor warranty
6500 CFM
4478 HVI-916 CFM
771-Watt， 2-speed PSC motor ensures efficient operation
1-speed wireless remote with timer
R-5 insulated gravity damper box
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
Acoustical ducting for a quieter operation
Fits between 16 in. or 24 in. on center joists， no joist-cutting required
Requires 5.5 sq. ft. of net free attic ventilation
Installation typically takes just a few hours
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