Natural Light 20-watt Solar Attic Fan Features: The environmentally sensible solution that can protect your home and save you money! EASY INSTALLATION - NO WIRING ? Reduces cooling load on AC units ? Operates on free solar energy ? Adjustable solar panel ? Three models available to fit all roof types ? Powder coated aircraft grade aluminum ? Best warranty in the industry 25-year warranty on solar panel 25-year warranty on housing 25-year warranty on motor Warranty from Natural Light. SOLAR ATTIC FAN WITH 20 WATT MODULE. INCREASES CFM TO 1200. Venting capacity of 1800 square feet of attic space per fan. The 20 watt solar panel is 16.5 x 19.75 This solar unit may qualify for the 30% federal solar tax credit. Begin saving electricity today! ....read more