Cardinal Ventilation 30 Watt Solar Attic Fan, 1650 CFM, FREE SHIPPING 30 Watt with capacity up to 1650 CFM for up to 2650 square feet of attic coverage All Metal, No Plastic, Adjustable Solar Panel, Commercial Grade Black Textured Powder Coated Finish ARRA Compliant, American Made - Manufactured, Designed & Engineered in the USA, Qualifies for Federal Tax Incentive Thermal Switch Included at No Charge, Highest Performing 14" Aluminum Fan Blade, No Wiring Required 15 Year Standard Parts Warranty with Limited Lifetime Warranty Upgrade option at time of product warranty registration