"Read More br Durabuild 527S-DUB-106-BLK Roof Mount Solar Powered Attic Fan 20-wattbr br Product Features br Ventilates up to 1850 square feetbr Has a quiet 24 volt motor powered by an industrial grade 20 watt solar panel that is thermostatically controlledbr Adjustable commercial grade 20 watt solar panelbr Limited 5 Year Warranty on Motor - 20 Year Warranty on Solar Panelbr May qualify for federal andor local tax rebate"