Attic Exhaust Fan, Control Type Thermostat, Blade Material Steel, Exhaust Airflow @ 0.000 in SP 1,140 cfm, Fire Safety Shut-Off No, High-Efficiency Motor No, Housing Material Steel, Includes Humidistat No, Includes Shutter No, Includes Thermostat Yes, Maximum Attic Area 1,630 sq ft, Motor Horsepower 1/16 hp, Mounting Location Gable, Nameplate Voltage 120V AC, Overall Diameter 15 in, Overall Height 8 in, Overall Length 15 in, Overall Width 15 in, Dome Shape Not Applicable WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov - Nickel (Metallic)