How Much Attic Fan Do I Need

If you need 6 000 cfm of air flow through your house divide 6 000 by 750 to get a minimum 8 square feet of.

How much attic fan do i need.

These fans are designed to remove excess heat from your attic which in theory is supposed to lessen the load on the air conditioning in your home. Professional help labor of 40 then the total would be 125. Powered exhaust vents feature an electric or solar powered fan to create an effect similar to that of a turbine view example on amazon. If you want your home air conditioner to cool you better then you might want one or two attic fans.

Always have a balanced ventilation system. All of that is in place. According to the home ventilating institute hvi powered attic ventilators need to move a minimum of 700 cubic feet per minute cfm for 1 000 sq. It might cost you approximately 300 600 for purchase and up to 550 when you include labor.

Yet i still see the attic temperature reach 145 degrees. Attic x 0 7 700 cfm minimum fan rating 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 is installed on the slanted side of your roof or on one of the gable sides of your attic. How an attic fan works.

Attic fans exhaust hot air from your attic to the outside. Attic fans are cheap compared to whole house fans. If you live in the right climate whole house fans are a great way to keep your house cool day and night and only use about 10 to 15 of the power drawn by a central air conditioner. I had my attic floor sealed and a good amount of blown in insulation.

All you need to know about attic ventilation. The moving air tries to cool down all the wood attic framing as without the fan the temperature. Ideally there should also be plenty of soffit intake space their calculations recommend 336 net square inches of open soffit ventilation to supply 700 cfm. 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.

Ft of attic space for example 20 x 50 to be effective. A 1500 square feet attic would cost 70 with additional humidistat costing 15.