Cool Attic CX3000EEAAWG Superior Power Attic Roof Mount Ventilator, Weathered Grey Coated Aluminum Dome 2.1 amp 115 volt 60 Hz energy efficient PSC Motor Aluminum dome weathered grey powder coat finish Attics up to 2,000 square feet Adjustable automatic thermostat Prolongs life of composition roof shingles with lower summer attic temperatures