Cool Attic CX3000EEAMBR Power Attic Roof Mount Ventilator with 2.1-Amp PSC Motor Flange, Brown Galvanized Steel Dome 2.1-Amp energy efficient PSC 115-Volt 60-Hz motor Galvanized steel dome brown Attics up to 2,000 square feet Adjustable automatic thermostat Prolongs life of composition roof shingles with lower summer attic temperatures