Cool Attic CX2001AMBL Power Attic Roof Mount Ventilator with 60-Hz Motor and Steel Flange, Black Galvanized Steel Dome 4.5-Amp 115-Volt 60-Hz motor Galvanized steel dome black Attics up to 2,000 square feet Adjustable automatic thermostat Prolongs life of composition roof shingles with lower summer attic temperatures