Attic Gable Fan Sizing

This indicates the amount of ventilation area independent of the gable opening where the fan is installed.

Attic gable fan sizing. In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq. Help determine optimal sizing of solar attic fans. Building codes vary. This model can be installed through the wall.

During workdays would leave air conditioner off when leaving in the morning. For a single story house this is usually the same as the square footage of the house itself plus any attached garage area. Of vent for every 300 sq. How to size solar attic exhaust vent fans so we developed our solar powered attic fan sizer calculator.

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. This was observed on numerous days following the installation. Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute. Always have a balanced ventilation system.

Temp 84f at 5pm. Example 20 wide by 50 long attic. The formula above gives an approximate value of the cfm needed for an attic fan. If you ve got access to your attic s gables iliving s gable mount fan is a great option for moving some air without having to cut a hole in your roof.

20 x 50 1 000 sq. Temp 92 f at 5pm. After attic fan installation ac still off during day. The attic fan kept my house cooler by 8f compared to pre fan installation days.

Attic fan size cfm 0 7 x sq ft area of the attic formula 1 the size of an attic fan is calculated in terms of cfm. To determine the size of your attic multiply the width by the length of the attic floor in feet.