Having a well ventilated attic will help keep the attic more temperate and dry which keeps the home more comfortable and thus requires less use of the heating and cooling system. This results in a more comfortable home and lower energy bills. Every home should have attic ventilation, and because the fans are solar powered, they require $0 to run. This is a great investment for well being, comfort, and bottom line.
The purpose of a solar attic fan is to reduce temperatures inside the attic and other enclosed spaces throughout the year. In the summer this helps make the living areas more comfortable and reduces HVAC usage which also saves energy. This helps reduce heat which can cause deterioration of shingles, roof boards, sheathing, siding, insulation, and valuables stored in the attic. Not to mention, this can also shorten the lifespan of an HVAC system.
In the winter, solar fans help to prevent moist air from condensing on the underside of the roof, beams, and rafters. Condensation can cause mildew, rotting of wood and excessive rusting of some components of the roof structure.