Exhaust Fan Assembled Assembled Blade Diameter 24 in Blade Material Polypropylene Drive Type Direct Drive Exhaust Airflow @ 0.000 in SP 10 660 cfm For Cut-Out Height 25 1/2 in For Cut-Out Width 25 1/2 in For Minimum Wall Thickness 3/4 in Frame Material Fiberglass Guard Finish Powder Coated Guard Material Steel Guard Type Intake Housing Material Aluminum Includes Intake Guard Includes Dehumidistat No Maximum Airflow 10 700 cfm