PRODUCT DESCRIPTION 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. Fan Diameter in. 14, Air Delivery CFM 1,300, Needs to be Hardwired Yes, Speeds qty. 1, Volts 120, Amps 2.6, Dimensions L x H in. 15 x 15, Depth in. 7. Galvanized steel construction Suitable for 1850 sq. ft. attic Includes 10 Amp adjustable thermostat Requires minimum 600 sq. in. net free air intake vent area Easy installation behind static gable louvers sold separately AMAZON.COM Keep your attic cool and ventilated with the power gable ventilator fan. It cools attics up to 1,850 square feet using a 14-inch fan with a 1300 CFM rating. The fan has an adjustable automatic thermostat and prolongs the life of composite roof shingles with lower summer attic temperatures. FROM THE MANUFACTURER The Ventamatic CX1500 power gable ventilator fan is a 1,300 CFM power attic roof-mount ventilator with a 2.6-amp motor and steel flange. It has an adjustable automatic thermostat. It works best for attics up to 1,850 square feet. It prolongs the life of composite roof shingles with lower summer attic temperatures. Ventamatic has provided the ventilation industry with an air of excellence for over 60 years. The factory is 100 percent powered by wind generated power, 95 percent of all waste products are recycled, and the packaging is recycled cardboard. See more