Choose a high-performance one with quad motors, dual speed, quite operation, small 'in-joist' bay ceiling installation , and less energy to draw more the air. Flush the hot air out of your house, before you choose to turn on the Air Conditioning (AC)... if you even need it. With 140 watts of power — a light bulb or two worth, they use about 85% less electricity than your central AC.

The ROI Calculation is based on purchasing a 1 - 1.7 Cubic Feet per Minute (CFM) Fan. Each year, save over $100 and also reduce the maintenance needed on your AC. To get a $50 Tax Credit, choose an even more efficient gas, oil, propane furnace or hot water boiler with a minimum of 95 AFUE.

The interior grill is only about 16” wide, and it works well at the top of stairs. To let the air from the whole house fan out of your attic, consider a dormer vent that is also only about 16” wide.

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