Attic Fan Cfm

Divide the cubic feet measurement by the cfm rating assigned to the fan.

Attic fan cfm. There are many types of attic fans such as. An attic fan on the other hand is a fan that exhausts only attic air out of the attic vents. Attic gable fans roof mount attic fans and solar attic fans. As the attic cools the smart fan will automatically cycle down to lower speeds the lowest being 1 000 cfm which only uses 15 watts of energy resulting in a cheaper air conditioning bill and cooler home temperature temperatures can drop as much as 50 degrees these two factors make it an excellent energy and cost saver.

And this is a gable fan. 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. 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. 17600 cubic feet 1600 11 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.

Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute. Iliving iliving automatic gable mount attic ventilator fan with adjustable thermostat 3 10 amp. I understand a blower door test would show the air leaks and i ve seen this 2x but i m trying to understand with an attic fan on in an unsealed attic the attic fan should pull the air in the home up into the attic. Of attic space at up to 1550 cfm.

Our stylish powder coated steel 30 watt fan will effectively ventilate up to 2500 sq. The natural light solar attic fan fan installs on a shingle roof and is capable of moving over 1 600 cfm of air impressive for a solar panel powered fan. Attic x 0 7 700 cfm minimum fan rating add an additional 20 cfm x 1 20 if you have a steep roof and 15 cfm x 1 15 for a dark roof. This calculator is designed to arrive at a reasonable attic or ceiling crawl space ventilation fan air volume displacement rating for minimum normal and optimum outside heat conditions.

This is the least expensive high quality fan feature for feature available. Master flow 15 in dia electric gable vent fan. And i agree with the additional energy costs but my attic fan is a 1500 cfm 40 watts. The formula above gives an approximate value of the cfm needed for an attic fan.

With energy costs higher than ever many homeowners are looking for ways to reduce their bills while still keeping the whole house cool.