How do you size a whole house fan?

Whole-house fans work best when sized correctly for your house. Find the overall air volume of your home. Multiply the total air volume in cubic feet by 30, which represents a complete air change every 2 minutes. Measure the area of your attic air vents. Select the whole-house fan that meets your ventilation needs. Click to see full answer. Likewise, how do I calculate CFM for my house? How to Calculate the CFM of a Room Measure the room’s width and length. Multiply the three measurements from step 1 to determine the cubic footage of the room. Multiply the cubic volume of the room by the number of times you want the air to turn over or exchange in an hour. Divide your answer from step 3 by 60 to calculate CFM. Additionally, how much does it cost to install a whole house fan? To add a whole house fan, homeowners pay between $1,250 and $1,830 on average. On the low end, you can expect to pay between $700 and $950 including labor. On the high end, the project can cost $2,000 – $2,750 including labor. There aren’t a whole lot of downsides to installation. Also know, how many CFM do I need for 1000 square feet? Heat and energy recovery ventilators Total area of home (square feet) Continuous ventilation rate 1,000 square feet 50 CFM 2,000 square feet 100 CFM 3,000 square feet 150 CFM How do you hook up a whole house fan to a two story house?) Why you must open a few windows or doors for a whole house fan to work. Always close your fireplace dampers. Only use a whole house fan when it is cooler outside (if cooling is your goal) Always turn off your whole house fan when you aren’t home.

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