What’s a solar attic fan? Solar attic fans are a natural, cost effective way to help your home be more comfortable and efficient. A well ventilated attic will keep the attic more temperate & dry, which keeps the home more comfortable, thus requiring less use of the heating and cooling system. Installing a solar fan results in a more comfortable home and lower energy bills. Every home should have proper attic ventilation with solar fans, and because our solar attic fans rely on the sun, they require $0 to run. Plus all of our solar attic fans include a lifetime warranty!