Attic Fan Cfm Size

Enter the length and width of your attic or ceiling crawl space.

Attic fan cfm size.

Ventilation rate of 10 air changes per hour. Cubic feet per minute or cfm is the amount of cubic feet of air per minute the fan moves. Attic fan size calculation. Then click on calculate.

A 30 inch fan will move 5 700 cfm. The higher the cfm cubic feet per minute the more airflow a fan can produce. Whole house fans come in a variety of sizes determined by the amount of air they circulate or whole house fan cfm. 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.

Remington solar 25 watt 1420 cfm gray solar powered attic fan model sf25 gr 339 00 339 00. The formula above gives an approximate value of the cfm needed for an attic fan. Choose a fan that matches your home or attic s size for optimal performance. Having an understanding of this makes choosing the correct fan size for your home an easier process.

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. 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. Set your store to see local availability add to cart.

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. Then enter the height at the highest point. Remington solar 1280 cfm powder coated galvanized steel hybrid solar electric powered attic fan model sf20 blk 315 00. For heating and air conditioning airflow or for other exhaust fan situations see our airflow calculator.

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. Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute. Fans are sold on the basis of diameter or the cfm of air they move. Attic x 0 7 700 cfm minimum fan rating.

Understanding whole house fan cfm. Add an additional 20 cfm x 1 20 if you have a steep roof and 15 cfm x 1 15 for a dark roof.