Exhaust Fan, Assembled Assembled, Blade Diameter 42 in, Blade Material Aluminum, Control Type Rotary Dial, Drive Type Direct Drive, Exhaust Airflow @ 0.000 in SP 14,900 cfm, For -Out Height 45 in, For -Out Width 45 in, For Maximum Wall Thickness 5 in, For Minimum Wall Thickness 5 in, Frame Finish Powder Coated, Frame Material Aluminum, Guard Finish Powder Coated, Guard Material Steel, Guard Type Intake, Housing Material Aluminum, Housing Finish Aluminum