Ten-year limited  warranty includes fiveyear Replacement Plus protection !Roof Mounted Power Attic Ventilator, Brown, 25" Diameter Metal Dome, 1500 High Capacity CFM, Ventilates Up To 2100 SQFT, With Adjustable Thermostat From 60 To 90 Degrees, 4.3 Amp Motor, 6 Bladed Fan Blade, 14-1/2" Diameter Opening, Needs 720 SQIN AIR VENT INC.

SF - PowerCool Plus™ 12 -- Premium Roof-MountWith automatic thermostat and humidistat1170 CFM for attics up to 1650 sq. ft.Ten Year Limited warranty and five-year Replacement Plus protection

Solar Power Roof Mounted Attic Fan SolarCool does not require any wiring or electrical hook-up. Initial installation costs are the homeowner's final costs! It's fast, efficient and affordable. The solar panel is on a bracket, allowing it to be tilted or rotated to the south or west for maximum sun exposure and optimal energy collection. And, because it's a single unit, it's easier to install. No electrical hook-up needed