The hot air gets trapped in your attic and insulation and acts like a large heated blanket that in turn heats up the living space inside your home.
The Whole House Fan takes the warm air from every part of your home and replaces it with the cooler outside air. It does this by pulling in the cooler outside air through one or two open windows.
The warm air is pulled out of your home and is pushed out the attic vents – cooling your attic as well as your living area.