Honeywell 527SHON100BLK 12-Watt Roof Mount Solar Powered Attic Fan Ventilates up to 1250-square-feet Thermostat controlled Adjustable commercial grade 12-watt solar panel Limited 5-year warranty on motor and 20-year warranty on solar panel May qualify for federal and/or local tax rebate Ventilates up to 1250 square feet Thermostat controlled Adjustable commercial grade 12 watt solar panel Limited 5 Year Warranty on Motor - 20 Year Warranty on Solar Panel May qualify for federal and/or local tax rebate