Attic Fans 1200 Square Feet

Attic vent fans are commonly rated from 800 to 1 600 cfm making one fans suitable for attics of up to around 2 200 square feet.

Attic fans 1200 square feet.

If your roof is 1200 sq ft soffit floor space you will need 4 sq feet of roof ventilation. Next multiply the 4 square feet into cubic inches. For example if the base is 12 feet and the height is 10 feet the square footage is 6 x 10 60 feet. You d need an attic fan rated at approximately 720 cfm.

1 cubic foot is 12 x 12 144 cubic inches. 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. Moving plenty of air through an average sized attic roughly 1 200 square feet. 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.

Attic x 0 7 700 cfm minimum fan rating. Ventilation area in square feet. Add an additional 20 cfm x 1 20 if you have a steep roof and 15 cfm x 1 15 for a dark roof. 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.

In order to find the right calculator divide the attic floor space by 300 sq feet. Step 5 add together the square footage values of the square rectangular and triangular floor areas to find the total square footage of your attic. Types of attic fans. And a 3 1 amp motor that provides ventilation for up to 1 600 square feet of attic.

Net free area in square inches. I read that venting is important. During the summer an attic can be 40 to 50 hotter than the outside temperature which in turn heats up the house very quickly. The fan is able to accommodate anywhere from 1 200 to 1 800 square feet of attic space.

Attic area in square feet. If you have 1 200 cubic feet of attic the calculation is 1 200 x 0 6 720.