Attic Fan Sizing

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.

Attic fan sizing.

Attic fan size calculation. Example 20 wide by 50 long attic. A whole house fan sucks warm house. Choose a fan that matches your home or attic s size for optimal performance.

Too low of a cfm and you. Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute. Too high of a cfm and you ll be spending more money running the fan than you should be. A whole house attic fan is installed in the ceiling between the top floor and the attic as a supplement to air conditioning.

Having an understanding of this makes choosing the correct fan size for your home an easier process. With an attic fan you can cool the attic to the same temperature as it is outside greatly reducing the house from heating as quickly. How to size a whole house attic fan. Help determine optimal sizing of solar attic fans.

By sizing and implementing a whole house fan you can pull the warm stale air from your entire home into the attic where it s vented outside. Understanding whole house fan cfm. The formula above gives an approximate value of the cfm needed for an attic fan. Next multiply the square feet of attic space by 0 7 to get the minimum number of cubic feet of air per minute that the fan should be rated to move.

During the summer an attic can be 40 to 50 hotter than the outside temperature which in turn heats up the house very quickly. Cubic feet per minute or cfm is the amount of cubic feet of air per minute the fan moves. 20 x 50 1 000 sq. Quietcool attic fans work almost everywhere almost anytime.

Whole house fans come in a variety of sizes determined by the amount of air they circulate or whole house fan cfm.