The Cool Attic standard-duty Attic Exhaust Ventilator offers effective power attic ventilation to reduce heat buildup, equalize temperatures inside and outside the attic, help prevent weather-induced home deterioration, and make living areas more comfortable - all while helping reduce the operating cost of air conditioning. Easy to install with no holes in roof. U.S.A. Needs to be Hardwired: Yes, Air Delivery (CFM): 1,300, Amps: 2.6, Speeds (qty.): 1, Volts: 120, Depth (in.): 7, Dimensions L x H (in.): 15 x 15, Fan Diameter (in.): 14