Until now, fan manufacturers struggled to design a simple, strong and reliable ceiling mount, whole-house fan. QC Manufacturing put an end to the noisy attic fan of old.A simple dual motor system designed to install from below, between 16" on center joists. Gravity damper doors open during operation and when off, they simply close tight maintaining the R 6.8 insulation value.Simple, yet effective with energy efficiency as well, at only 39 Watts per motor. Features:. 1,104 CFM. Just 39 Watts while developing 552 CFM per motor. Easily fits between 16" on Center joists. Perfect for the home with insufficient crawl space to accommodate a ducted fan. Specifications:. Motor Voltage: 120 VAC 60 Hz. Power Consumption (High / Low): 78 Watts / 39 Watts. CFM / Watt: 14.2. Air Flow @ 0.1" SP (High / Low): 1,104 CFM / 552 CFM. Sound Level in Room: 43 dBA. R Value at Closed Damper: R 4.2. Ceiling Rough Opening: 13-1/4" x 22-1/4". Intake Grill Color: White
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