How Do You Measue For A Attic Fan

For open blade fans see our ceiling fan calculator.

How do you measue for a attic fan.

And then add insulation if your attic does not have the recommended levels. I know the dimensions of my attic space. Next multiply the square feet of attic space by 0 7 to get the minimum number of cubic feet of air per. Ceiling fans come in a variety of sizes ranging from 30 inches for small rooms to 70 inches for larger rooms.

Calculate the required cfm air flow. You want to make the ceiling plane is as air tight as possible. Option 1 moderate flow efficient cooling 1 5 2 0 cfm of air flo. Measure the length and width of each floor of your home with the tape measure.

You can check the recommended levels of insulation for your region on the energy star website here. Its a matter of personal preference. They can cool your home in less than an hour. Measure the length of one blade from tip to base.

Then enter the height at the highest point. You can size a whole house fan for either a moderate flow or the breeze effect. Enter the length and width of your attic or ceiling crawl space. The formula above gives an approximate value of the cfm needed for an attic fan.

Find the overall air volume of your home. More importantly though you ll need to choose the right size ceiling fan according to the size of the room. A typical fan can t do both the work of an attic and the whole house fan but a whole house fan does both. How to size attic exhaust vent fans for your home attic size.

Attic fan size calculation. To determine the size of your attic multiply the width by the length of the attic floor in feet. Multiply the blade length by two and add that measurement to the hub diameter from step 3 to determine your total fan diameter. Multiply length times.

Multiply the total air volume in cubic feet by 30 which represents a complete air change every 2 minutes. How to size a whole house attic fan. They can cool your home in less than an hour. For heating and air conditioning airflow or for other exhaust fan situations see our airflow calculator.

Fans that measure 52 inches are the most commonly used. One of the most asked questions we get is what size whole house fan do i need. Select if your roof is more flat of peaked. Finding the right sized whole house fan for your home.

Attic fan size calculator step 1. Be sure to measure from just above the blade root as shown or from where the blade meets the hub in an assembled fan. Then click on calculate.