Attic Gable Fan Sizing

This was observed on numerous days following the installation.

Attic gable fan sizing. Always have a balanced ventilation system. 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. During workdays would leave air conditioner off when leaving in the morning. Example 20 wide by 50 long attic.

Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute. The attic fan kept my house cooler by 8f compared to pre fan installation days. Of vent for every 300 sq. For a single story house this is usually the same as the square footage of the house itself plus any attached garage area.

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. 20 x 50 1 000 sq. Temp 92 f at 5pm.

To determine the size of your attic multiply the width by the length of the attic floor in feet. The opening of the boom mouth must be large enough for the attic fan to consume the hot air from the attic. 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 attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic.

The formula above gives an approximate value of the cfm needed for an attic fan. Building codes vary. Temp 84f at 5pm. Gable fans will be rated for a certain amount of free space ventilation.

After attic fan installation ac still off during day. This indicates the amount of ventilation area independent of the gable opening where the fan is installed.