Attic Ventilator APG Gable Mount Power Attic Ventilator, 1620 CFM, Ventilates Up To 2300 SQFT, With Adjustable Thermostat From 60 To 120 Degrees, 15" Diameter Housing, 14" Diameter Fan Blade, 3.7 Amp Motor, 4 Bladed Fan Blade, Needs 778 SQIN Of Net Free Intake Air, 10 Year Limited Parts Warranty, 5 Year Limited Labor Warranty.Brand new