Powered completely by free solar energy, this sleek and efficient vent is both compact and quiet. Fully operational right from the box, it installs easily on pitched fiberglass-asphalt shingle roofs, with no electrical wiring, no expensive electrician and city permits. And let’s not forget powerful! A single 12 watt unit can fully vent up to 1,260 square feet, operating at up to 893 cfms. Place it wherever you need improved circulation; attics, lofts, workshops, storage sheds, garages, even barns. Attic venting is an important aspect in maintaining a healthy energy efficient home. Proper venting cools your roof extending the material life and reduces the load on your air conditioning system.