"This Cool Attic Power Roof Vent helps keep your home cooler while reducing energy bills. Plus, this efficient vent prevents weather-induced home deterioration. Air Delivery CFM 1,400, Volts 120, Dimensions W x D x H in. 25 x 25 x 10, Amps 2.1, Speeds qty. 1, Power Cord ft. Hardwired. Helps reduce air conditioning operating costs Prevents weather-induced home deterioration Precision-balanced 14in. fan blades for minimum vibration and no heat distortion Thermally protected motors run cooler for longer life Adjustable thermostat Galvanized steel dome Suitable for 2400 sq. foot attic For up to 8/12 roof pitch Must have minimum 600 square inches free air intake area Requires hardwired electrical connection"