Supply Fan w/Drive Package, Assembled Unassembled, Blade Diameter 48 in, Blade Material Steel, Drive Type Belt Drive, Exhaust Airflow @ 0.000 in SP 17, 349 cfm, For Cut-Out Height 50 1/2 in, For Cut-Out Width 50 1/2 in, Frame Finish Zinc Plated, Frame Material Steel, Guard Type None, Includes Drive Package, Includes Dehumidistat No, Maximum Airflow 17, 349 cfm, Maximum Noise Level 13.1 sones