All-aluminum construction. Deep drawn flange and rain shield keep water out. Factory-set adjustable thermostat switches on at 100 degrees and off at 85 degrees Fahrenheit. Thermostat features a push-to-test button. Balanced fan blades for quiet operation. 8 in. x 8 in. aluminum screen attached for insect protection. 20 in. x 23 in. base plate. Features 12 in. diameter blade. 3.4 amp, 120 volt, 1100 RPM motor. 11-0602.02 Miami Dade County approved.