Gable Mounted Solar Attic Fan - 60 Watts - 3100 sq ft The Solar Attic Fan is a simple and environmentally sensible solution that can save you money. Powered completely by free solar energy, this sleek and efficient vent is both compact and quiet. It installs easily, with no electrical wiring, no expensive electrician and city permits A single 60 watt unit can fully vent up to 3255 square feet, operating at up to 1995 cfms. Place it wherever you need improved circulation; attics, lofts, workshops, storage sheds, garages, even barns.