Attic Fan Cfm Size

Attic vent fans are commonly rated from 800 to 1 600 cfm making one fans suitable for attics of up to around 2 200 square feet.

Attic fan cfm size.

For example a typical 36 inch diameter whole house fan will move 6 900 cfm of air. Too high of a cfm and you ll be. Fans are sold on the basis of diameter or the cfm of air they move. For heating and air conditioning airflow or for other exhaust fan situations see our airflow calculator.

Then enter the height at the highest point. Ventilation rate of 10 air changes per hour. Remington solar 1280 cfm powder coated galvanized steel hybrid solar electric powered attic fan model sf20 blk 315 00. Add an additional 20 cfm x 1 20 if you have a steep roof and 15 cfm x 1 15 for a dark roof.

Understanding whole house fan cfm. The formula above gives an approximate value of the cfm needed for an attic fan. Cubic feet per minute or cfm is the amount of cubic feet of air per minute the fan moves. A 30 inch fan will move 5 700 cfm.

Having an understanding of this makes choosing the correct fan size for your home an easier process. Attic x 0 7 700 cfm minimum fan rating. 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. Select if your roof is more flat of peaked.

Enter the length and width of your attic or ceiling crawl space. Remington solar 25 watt 1420 cfm gray solar powered attic fan model sf25 gr 339 00 339 00. 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. Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute.

Attic fan size calculation. Set your store to see local availability add to cart. 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. Then click on calculate.

The higher the cfm cubic feet per minute the more airflow a fan can produce. Choose a fan that matches your home or attic s size for optimal performance.