Solar Attic Fan with 25-year Warranty! by Natural Light 12-Watt model rated up to 893 CFM for areas up to 1260 Sq. Ft. 25-year Manufacturer warranty on solar panel, motor and housing. Designed for use on Pitched Roofs with Asphalt/Fiberglass Shingles. No wiring necessary -Easily Installed. Adjustable 12-watt Solar panel - Assembled and Ready to install.