Attic Exhaust Fan Control Type Manual Blade Material Aluminum Exhaust Airflow @ 0.000 in SP 1 000 cfm Base Material Galvanized Steel Fire Safety Shut-Off No High-Efficiency Motor Yes Housing Material Steel Includes Humidistat No Includes Shutter No Includes Thermostat No Maximum Attic Area 1 550 sq ft Motor Horsepower 1/10 hp Mounting Location Gable Nameplate Voltage 18V DC Overall Diameter 15 in Overall Height 5 3/4 in Overall Length 15 in Overall Width 51 in