Cabinet Exhaust Fan, Assembled Assembled, Blade Diameter 36 in, Blade Material Steel, Drive Type Belt Drive, Duct Diameter Not Applicable, Exhaust Airflow @ 0.000 in SP 12,365 cfm, For -Out Height 41 1/4 in, For -Out Width 41 1/4 in, Frame Finish Zinc Plated, Frame Material Steel, Guard Finish Galvanized, Guard Material Steel, Guard Type None, Housing Material Steel, Housing Finish Galvanized, Includes (4) Wall Mounting Angles, Includes Dehumidistat No, Maximum Airflow 12,355 cfm