Exhaust Fan with Drive Package Assembled Unassembled Blade Diameter 60 in Blade Material Aluminum Drive Type Belt Drive Exhaust Airflow @ 0.000 in SP 40 778 cfm For Cut-Out Height 62 1/2 in For Cut-Out Width 62 1/2 in Frame Finish Zinc Plated Frame Material Steel Guard Type None Includes Drive Package Includes Dehumidistat No Maximum Airflow 40 778 cfm Maximum Noise Level 27 sones