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.

Attic gable fan sizing.

This was observed on numerous days following the installation. Help determine optimal sizing of solar attic fans. 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 model can be installed through the wall.

The attic fan kept my house cooler by 8f compared to pre fan installation days. The opening of the boom mouth must be large enough for the attic fan to consume the hot air from the attic. During workdays would leave air conditioner off when leaving in the morning. Gable fans will be rated for a certain amount of free space ventilation.

20 x 50 1 000 sq. Building codes vary. To determine the size of your attic multiply the width by the length of the attic floor in feet. 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.

Of vent for every 300 sq. 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. This indicates the amount of ventilation area independent of the gable opening where the fan is installed. Temp 84f at 5pm.

How to size solar attic exhaust vent fans so we developed our solar powered attic fan sizer calculator. Example 20 wide by 50 long attic. For a single story house this is usually the same as the square footage of the house itself plus any attached garage area. Always have a balanced ventilation system.

The formula above gives an approximate value of the cfm needed for an attic fan. Temp 92 f at 5pm.