Exhaust Fan Assembled Assembled Blade Diameter 16 in Blade Material Aluminum Drive Type Direct Drive Duct Diameter 16 1/2 in Exhaust Airflow @ 0.000 in SP 1 334 cfm Frame Finish Galvanized Frame Material Steel Guard Finish Zinc Plated Guard Material Steel Guard Type Intake Includes Dehumidistat No Maximum Noise Level 10.2 sones