Natural Light 20 Watt Solar Attic Fan Natural Light Solar Attic Fans are easy to install. No Wiring and no expensive electrician or permits are needed. Detailed installation instructions are provided with each unit. Saves You Money! The Solar Attic Fan is a simple and environmentally sensible solution. 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, with no electrical wiring, no expensive electrician and city permits. And let's not forget powerful! A 20 watt unit can fully vent up to 1,800 square feet, operating at up to 1200 cfms. Requires about a 19" circle of space on your roof. 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. Attic venting also increases fresh air circulation, which reduces vapor build up generated by every day activities like showering and cooking. Excess moisture trapped in your attic can cause a variety of problems from rust and rot to increased bacteria and mold counts, which can have a direct impact on your respiratory health! Passive vents have been a part of building codes for years. Soffit vents, ridge vents and louvers rely on nature to provide sufficient air pressure and air movement. So the majority of the time your attic is stagnant and continues to build up heat and moisture. Warranty 25 Years on the Housing 15 Years on the Solar Panel 5 Years on the Motor And let's not forget powerful! A single 10 watt unit can fully vent up to 1,200 square feet, operating at up to 850 cfms. Requires about a 19" circle of space on your roof. 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. Attic venting also increases fresh air circulation, which reduces vapor build up generated by every day activities like showering and cooking. Excess moisture trapped in your attic can cause a variety of problems from rust and rot to increased bacteria and mold counts, which can have a direct impact on your respiratory health! Passive vents have been a part of building codes for years. Soffit vents, ridge vents and louvers rely on nature to provide sufficient air pressure and air movement. So the majority of the time your attic is stagnant and continues to build up heat and moisture. Warranty 25 Years on the Housing 15 Years on the Solar Panel 5 Years on the Motor