Size Attic Fan Needed

Next multiply the square feet of attic space by 0 7 to get the minimum number of cubic feet of air per.

Size attic fan needed.

How to size attic exhaust vent fans for your home attic size. Your soffit ventilation actually needs to be considerably more than 336 net square inches to supply a 700 cfm fan system or the fan is going to pull the air it needs through unsealed holes and gaps in the attic floor from the conditioned living space. Select if your roof is more flat of peaked. What this means is that every eleven minutes the air in the home is being exchanged by a fan of this rating along with having windows open in each room.

Some professionals multiply the square feet value with 0 6 instead of 0 7. Cool your home without the use of air conditioning and replace stale air with fresh outdoor air in your entire home with the help of a whole house fan. If you have a regular sized bedroom of 144 to 225 square feet then a medium ceiling fan with a blade span of 44 to 50 inches will be a great fit. To facilitate faster air exchange would necessitate choosing a fan with a higher cfm.

Calculate how many solar attic fans you need to achieve proper ventilation with this free helpful attic fan size calculator from energy efficient solutions. 17600 cubic feet 1600 11. You will want to check your fan to ensure that its cfm rating is anywhere between 1 600 and 4 500. How to know what size whole house fan you need.

Size and choose the correct whole house fan for your home. How to size a whole house attic fan. Then enter the height at the highest point. In terms of sizing your ceiling fan for your bedroom there are two common size options for bedrooms.

Then click on calculate. Measure the length and width of each floor of your home with the tape measure. 972 499 4550 view cart. Multiply the total air volume in cubic feet by 30 which represents a complete air change every 2 minutes.

Multiply length times. Enter the length and width of your attic or ceiling crawl space. Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute. Radiant barrier foil.

Whole house fan sizing calculator. The formula above gives an approximate value of the cfm needed for an attic fan.