Exhaust Fan with Drive Package Assembled Unassembled Blade Diameter 30 in Blade Material Steel Drive Type Belt Drive Exhaust Airflow @ 0.000 in SP 11 061 cfm For Cut-Out Height 32 1/2 in For Cut-Out Width 32 1/2 in Frame Finish Zinc Plated Frame Material Steel Guard Type None Includes Drive Package Includes Dehumidistat No Maximum Airflow 11 061 cfm Maximum Noise Level 22 sones