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.
Sizing an attic fan.
How to size solar attic exhaust vent fans so we developed our solar powered attic fan sizer calculator.
This attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic.
A whole house attic fan is installed in the ceiling between the top floor and the attic as a supplement to air conditioning.
A whole house fan sucks warm house.
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.
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.
The formula above gives an approximate.
However i think the fan sizing above is excessive.
Help determine optimal sizing of solar attic fans.
Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute.