Size Attic Fan Needed

Multiply length times.

Size attic fan needed. To determine the size of your attic multiply the width by the length of the attic floor in feet. 972 499 4550 view cart. 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. 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.

Find the overall air volume of your home. Then enter the height at the highest point. 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. Select if your roof is more flat of peaked.

Measure the length and width of each floor of your home with the tape measure. The formula above gives an approximate value of the cfm needed for an attic fan. Size and choose the correct whole house fan for your home. Some professionals multiply the square feet value with 0 6 instead of 0 7.

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. 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. Then click on calculate. You will want to check your fan to ensure that its cfm rating is anywhere between 1 600 and 4 500.

Multiply the total air volume in cubic feet by 30 which represents a complete air change every 2 minutes. How to size attic exhaust vent fans for your home attic size. Radiant barrier foil. To facilitate faster air exchange would necessitate choosing a fan with a higher cfm.

Next multiply the square feet of attic space by 0 7 to get the minimum number of cubic feet of air per. How to size a whole house attic fan. How to know what size whole house fan you need. Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute.

In terms of sizing your ceiling fan for your bedroom there are two common size options for bedrooms. Whole house fan sizing calculator.