Attic Gable Fan Sizing

During workdays would leave air conditioner off when leaving in the morning.

Attic gable fan sizing.

This model can be installed through the wall. 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. Always have a balanced ventilation system. Gable fans will be rated for a certain amount of free space ventilation.

Example 20 wide by 50 long attic. After attic fan installation ac still off during day. Temp 84f at 5pm. 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.

Building codes vary. 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. Of vent for every 300 sq.

In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq. This indicates the amount of ventilation area independent of the gable opening where the fan is installed. The opening of the boom mouth must be large enough for the attic fan to consume the hot air from the attic. The formula above gives an approximate value of the cfm needed for an attic fan.

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. Temp 92 f at 5pm. Help determine optimal sizing of solar attic fans. 20 x 50 1 000 sq.

How to size solar attic exhaust vent fans so we developed our solar powered attic fan sizer calculator. The attic fan kept my house cooler by 8f compared to pre fan installation days.