Cabinet Exhaust fan with Shutter, Assembled Assembled, Blade Diameter 48 in, Blade Material Steel, Drive Type Belt Drive, Exhaust Airflow @ 0.000 in SP 19,405 cfm, Frame Material Steel, Guard Finish Zinc, Guard Material Steel, Guard Type Exhaust, Housing Finish Galvanized, Includes Deep Cabinet, Discharge Shutter, Includes Dehumidistat No, Maximum Noise Level 80 dB