Cabinet Exhaust Fan Assembled Assembled Blade Diameter 54 in Blade Material Steel Drive Type Belt Drive Duct Diameter Not Applicable Exhaust Airflow @ 0.000 in SP 35 881 cfm For Cut-Out Height 61 1/4 in For Cut-Out Width 61 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 36 802 cfm