Attic Exhaust Fan, Control Type Humidistat, Thermostat, Blade Material Steel, Exhaust Airflow @ 0.000 in SP 1,650 cfm, Fire Safety Shut-Off No, High-Efficiency Motor No, Housing Material Plastic, Includes Humidistat Yes, Includes Shutter No, Includes Thermostat Yes, Maximum Attic Area 2,300 sq ft, Motor Horsepower 1/8 hp, Mounting Location Gable, Nameplate Voltage 120V AC, Overall Diameter 17 in, Overall Height 6 7/8 in, Overall Length 21 in, Overall Width 21 in, Dome Shape Not Applicable