How Do You Measue For A Attic Fan

Its a matter of personal preference.

How do you measue for a attic fan. For open blade fans see our ceiling fan calculator. Option 1 moderate flow efficient cooling 1 5 2 0 cfm of air flo. Multiply the blade length by two and add that measurement to the hub diameter from step 3 to determine your total fan diameter. They can cool your home in less than an hour.

Measure the length and width of each floor of your home with the tape measure. To determine the size of your attic multiply the width by the length of the attic floor in feet. One of the most asked questions we get is what size whole house fan do i need. More importantly though you ll need to choose the right size ceiling fan according to the size of the room.

Next multiply the square feet of attic space by 0 7 to get the minimum number of cubic feet of air per. A typical fan can t do both the work of an attic and the whole house fan but a whole house fan does both. Then enter the height at the highest point. The formula above gives an approximate value of the cfm needed for an attic fan.

Attic fan size calculation. You can also view my blog post about attic air sealing here as well as a great article from a well respected professional in the home performance industry about power attic ventilators here. You can check the recommended levels of insulation for your region on the energy star website here. Calculate the required cfm air flow.

Attic fan size calculator step 1. And then add insulation if your attic does not have the recommended levels. Finding the right sized whole house fan for your home. Multiply the total air volume in cubic feet by 30 which represents a complete air change every 2 minutes.

Then click on calculate. How to size a whole house attic fan. Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute. Ceiling fans come in a variety of sizes ranging from 30 inches for small rooms to 70 inches for larger rooms.

You want to make the ceiling plane is as air tight as possible. Multiply length times. Measure the length of one blade from tip to base. How to size attic exhaust vent fans for your home attic size.

Enter the length and width of your attic or ceiling crawl space. Fans that measure 52 inches are the most commonly used. Find the overall air volume of your home. For heating and air conditioning airflow or for other exhaust fan situations see our airflow calculator.

You can size a whole house fan for either a moderate flow or the breeze effect. Be sure to measure from just above the blade root as shown or from where the blade meets the hub in an assembled fan. I know the dimensions of my attic space.