Size Attic Fan Needed

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.

Size attic fan needed.

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. Find the overall air volume of your home. 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. Multiply the total air volume in cubic feet by 30 which represents a complete air change every 2 minutes. Select if your roof is more flat of peaked. Next multiply the square feet of attic space by 0 7 to get the minimum number of cubic feet of air per.

To determine the size of your attic multiply the width by the length of the attic floor in feet. The formula above gives an approximate value of the cfm needed for an attic fan. Multiply length times. 17600 cubic feet 1600 11.

To facilitate faster air exchange would necessitate choosing a fan with a higher cfm. Then click on calculate. How to size a whole house attic fan. Radiant barrier foil.

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. Calculate how many solar attic fans you need to achieve proper ventilation with this free helpful attic fan size calculator from energy efficient solutions. Size and choose the correct whole house fan for your home. Enter the length and width of your attic or ceiling crawl space.

In terms of sizing your ceiling fan for your bedroom there are two common size options for bedrooms. Then enter the height at the highest point. 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. Measure the length and width of each floor of your home with the tape measure.

How to size attic exhaust vent fans for your home attic size. Whole house fan sizing calculator.