Exhaust Fan, Assembled Assembled, Blade Diameter 24 in, Blade Material Aluminum, Drive Type Direct Drive, Duct Diameter 24 1/2 in, Exhaust Airflow @ 0.000 in SP 6,254 cfm, Frame Finish Galvanized, Frame Material Steel, Guard Finish Zinc Plated, Guard Material Steel, Guard Type Intake, Includes Dehumidistat No, Maximum Noise Level 21 sones