Exhaust/Supply Fan Assembled Unassembled Blade Diameter 30 in Blade Material Aluminum Drive Type Belt Drive Exhaust Airflow @ 0.000 in SP 14 165 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 14 165 cfm Maximum Noise Level 36 sones