Attic Fan Cfm Size

For heating and air conditioning airflow or for other exhaust fan situations see our airflow calculator.

Attic fan cfm size.

For example a typical 36 inch diameter whole house fan will move 6 900 cfm of air. Having an understanding of this makes choosing the correct fan size for your home an easier process. For open blade fans see our ceiling fan calculator. Remington solar 1280 cfm powder coated galvanized steel hybrid solar electric powered attic fan model sf20 blk 315 00.

Set your store to see local availability add to cart. Fans are sold on the basis of diameter or the cfm of air they move. Ventilation rate of 10 air changes per hour. Select if your roof is more flat of peaked.

Add an additional 20 cfm x 1 20 if you have a steep roof and 15 cfm x 1 15 for a dark roof. 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 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. Whole house fans come in a variety of sizes determined by the amount of air they circulate or whole house fan cfm.

Then enter the height at the highest point. Then click on calculate. Attic x 0 7 700 cfm minimum fan rating. The higher the cfm cubic feet per minute the more airflow a fan can produce.

Understanding whole house fan cfm. Remington solar 25 watt 1420 cfm gray solar powered attic fan model sf25 gr 339 00 339 00. 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 size calculation.

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. Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute. Choose a fan that matches your home or attic s size for optimal performance. 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.

Too high of a cfm and you ll be. The formula above gives an approximate value of the cfm needed for an attic fan.