Attic Fans 1200 Square Feet

Moving plenty of air through an average sized attic roughly 1 200 square feet.

Attic fans 1200 square feet.

It s perfect for reducing cooling costs as it pulls fresh air from outside and expels warm attic air out through the exhaust vents. The fan is able to accommodate anywhere from 1 200 to 1 800 square feet of attic space. Attic area in square feet. I read that venting is important.

Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. Types of attic fans. With an attic fan you can cool the attic to the same temperature as it is outside greatly reducing the house from heating as quickly. During the summer an attic can be 40 to 50 hotter than the outside temperature which in turn heats up the house very quickly.

An attic fan used for venting pushes the hot air out the roof space so if it isn t replaced from outdoors you get depressurization. If you have 1 200 cubic feet of attic the calculation is 1 200 x 0 6 720. Net free area in square inches. For example if the base is 12 feet and the height is 10 feet the square footage is 6 x 10 60 feet.

Next multiply the 4 square feet into cubic inches. Add an additional 20 cfm x 1 20 if you have a steep roof and 15 cfm x 1 15 for a dark roof. Attic x 0 7 700 cfm minimum fan rating. If your roof is 1200 sq ft soffit floor space you will need 4 sq feet of roof ventilation.

You d need an attic fan rated at approximately 720 cfm. Ventilation area in square feet. In order to find the right calculator divide the attic floor space by 300 sq feet. 1 cubic foot is 12 x 12 144 cubic inches.

Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. And a 3 1 amp motor that provides ventilation for up to 1 600 square feet of attic.