Sizing Attic Ventilation Fans

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.

Sizing attic ventilation fans.

How to size a whole house attic fan. So here the cfm of the fan cfm x 1 15. If your attic requires a 1500 cfm fan then it should also have a 1500 300 5 sq ft air vent. Example 20 wide by 50 long attic.

Our installer friendly energy star ventilation solutions help you design beyond code without compromising interior aesthetics. A whole house attic fan is installed in the ceiling between the top floor and the attic as a supplement to air conditioning. They can quickly remove a larger volume of hot and or humid air from your attic compared to static ventilation which helps save money on your heating and cooling. Attic fan size chart for quick reference.

A whole house fan sucks warm house. 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. Intake air vent size. Master flow egv5 gable mount attic ventilators are master flow egv5 gable mount attic ventilators are a great choice for exhaust ventilation.

Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. See the benefits of attic ventilation a new roof is more than just shingles. 20 x 50 1 000 sq. This attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic.

They are typically easier to install and won t detract from the appearance of your roof. The result is a cooler attic space with plenty of air exchange. Well managed indoor air quality is crucial to code compliance. Attic fans perform this ventilation by pushing hot air out into the environment while also pulling fresh cool air into the attic.