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.
Sizing an attic fan.
The formula above gives an approximate.
A whole house fan sucks warm house.
I am now a believer in powered attic ventilation.
Help determine optimal sizing of solar attic fans.
A whole house attic fan is installed in the ceiling between the top floor and the attic as a supplement to air conditioning.
How to size solar attic exhaust vent fans so we developed our solar powered attic fan sizer calculator.
How to size a whole house attic fan.
Attic fan size calculation 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.
However i think the fan sizing above is excessive.
A fan sized using the above formula would cause 10 to 30 air exchanges per hour depending on the height of the attic more than the recommendation for a steam filled bathroom.