Supply Fan w/Drive Package, Assembled Unassembled, Blade Diameter 42 in, Blade Material Steel, Drive Type Belt Drive, Exhaust Airflow @ 0.000 in SP 16,646 cfm, For -Out Height 44 1/2 in, For -Out Width 44 1/2 in, Frame Finish Zinc Plated, Frame Material Steel, Guard Type None, Includes Drive Package, Includes Dehumidistat No, Maximum Airflow 16,646 cfm, Maximum Noise Level 19.7 sones