Attic Fan Size Chart

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.

Attic fan diy. Likewise it will cost an average of 26 to 91 cents an hour to run a whole house fan. The company that did the house energy efficiency test said there were no govenment guidelines to size an attic fan and the websites that sell attic fans have calculators but since they sell attic fans i dont know how reliable they are. These are estimates based on square footage and roof pitch.

A whole house fan sucks warm house. Solar attic fan sizing charts. Help determine optimal sizing of solar attic fans.

Proceed to step 2 and use the chart to determine the size and number of solar powered attic ventilation fans required to achieve a min. Our house is 2000 sq ft with cathedral ceilings in the living areas and 8 ft in the bedrooms. Whole house fans use 200 to 650 watts of energy in an hour depending on their cfm rating.

How to size solar attic exhaust vent fans so we developed our solar powered attic fan sizer calculator. Its also important to have plenty of soffit or gable vents for the fan to draw air into the attic. Use the chart below as an attic vent fan cfm calculator.

Sizing a whole house fan at this rate will make you feel coolest as well as reduce the temperature in your home the fastest. How much energy does a whole house fan use. To find out if you have enough vent space divide the cubic feet of air per minute that the fan is rated for by 300 to come up with the minimum number of square feet of intake vent space needed for that size fan.

Ventilation rate of 10 air changes per hour. Ft home would need a 5000 cfm rated fan to achieve the 25 cfm per sq. How to size a whole house attic fan.

The same home would need a 6000 cfm rated fan to achieve 30 cfm per sq. Attic fan size chart for quick reference. A whole house attic fan is installed in the ceiling between the top floor and the attic as a supplement to air conditioning.

By sizing and implementing a whole house fan you can pull the warm stale air from your entire home into the attic where its vented outside. To determine how many fans are needed for your home contact us and we will have your local independent authorized yellowblue dealer reach out to you directly.