Attic Exhaust Fan Control Type Smart Control Hub Blade Material Steel Exhaust Airflow @ 0.000 in SP 1 495 cfm Base Material Steel Fire Safety Shut-Off Yes High-Efficiency Motor No Housing Material Steel Includes Humidistat No Includes Shutter No Includes Thermostat Yes Maximum Attic Area 3 000 sq ft Motor Horsepower Not Applicable Mounting Location Gable Nameplate Voltage 120V AC Overall Diameter 16 1/2 in Overall Height 16 1/2 in Overall Length 16 1/2 in Overall Width 9 3/4 in