When the air inside your home is warmer than the air outside, you may think to open your windows and let the cool air in. The problem this poses is that, without proper airflow, you're not going to effectively cool your whole house.-->
In order to get the right-sized whole house fan, you'll need to size it to exchange the appropriate amount of CFM (cubic feet of air per minute). Our whole house fan sizing tool can help you determine the right size for your home without doing a lot of math.
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A whole house fan removes warm air from your home and pulls in fresh, cool air from the outdoors. It's centrally installed in the ceiling of your home, and moves air out through ductwork in the attic. Perfect for the shoulder seasons of spring and autumn when the outside air is cooler, a whole house fan can save an estimated 50%-90% off traditional air conditioners.
Keep in mind that you'll need to keep some windows open when using a whole house fan. As the fan sucks the warm indoor air out the attic, it makes room for cool, outdoor air to rush into the home below. This creates an invigorating natural breeze.