Supply Fan w/Drive Package Assembled Unassembled Blade Diameter 36 in Blade Material Steel Drive Type Belt Drive Exhaust Airflow @ 0.000 in SP 13 802 cfm For Cut-Out Height 38 1/2 in For Cut-Out Width 38 1/2 in Frame Finish Zinc Plated Frame Material Steel Guard Type None Includes Drive Package Includes Dehumidistat No Maximum Airflow 13 802 cfm Maximum Noise Level 18.7 sones