How To Size Solar Attic Fan

The formula above gives an approximate value of the cfm needed for an attic fan.

How to size solar attic fan. Too high of a cfm and you ll be spending. Alternatively for more precise calculations you can provide your actual floor area. Fan size most attics are around the same square footage as your home. To start enter the length width and height of your attic.

The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows. Whole house fans work on the principle of removing the hot and humid air out of the house. Attic x 0 7 700 cfm minimum fan rating add an additional 20 cfm x 1 20 if you have a steep roof and 15 cfm x 1 15 for a dark roof. Solar attic fan sizing calculator.

How to size solar attic exhaust vent fans so we developed our solar powered attic fan sizer calculator. A steep roof will increase internal attic volume and a dark roof will increase energy absorption from the sun. The higher the cfm cubic feet per minute the more airflow a fan can produce. The whole house fan is installed inside the attic between the living space and ceiling.

If you do this you don t need to enter a length or width. Attic fan size calculator this attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic. Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute. Use this estimator to help figure out how many attic fans you will need.

Help determine optimal sizing of solar attic fans. 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. Ft of your home by 0 7 will give you an approximate minimum cubic feet of air a fan should be able to move per minute.