Attic Fan Sizing

Having an understanding of this makes choosing the correct fan size for your home an easier process.

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. Example 20 wide by 50 long attic. Simultaneously cool fresh air will be pulled through the open windows and circulated through every room effectively replacing all of the air in your home and minimizing your dependence on air conditioning. Help determine optimal sizing of solar attic fans.

The formula above gives an approximate value of the cfm needed for an attic fan. This attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic. 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. Quietcool attic fans work almost everywhere almost anytime.

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. Understanding whole house fan cfm. A whole house attic fan is installed in the ceiling between the top floor and the attic as a supplement to air conditioning. Whole house fans come in a variety of sizes determined by the amount of air they circulate or whole house fan cfm.

20 x 50 1 000 sq. Choose a fan that matches your home or attic s size for optimal performance. Too high of a cfm and you ll be spending more money running the fan than you should be. During the summer an attic can be 40 to 50 hotter than the outside temperature which in turn heats up the house very quickly.

Attic fan size calculation. A whole house fan sucks warm house. 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. Cubic feet per minute or cfm is the amount of cubic feet of air per minute the fan moves.

How to size a whole house attic fan.