Cool Attic CX1000AMUPS Power Attic Roof Mount Ventilator with 3.4 Amp 60 Hz Motor and Steel Flange, Galvanized Steel Dome 3.4-Amp 115-volt 60-hz motor Galvanized Steel dome mill finish Attics up to 1,600 square feet Adjustable automatic thermostat Prolongs life of composition roof shingles with lower summer attic temperatures