Shutter Mount Exhaust Fan Assembled Assembled Blade Diameter 12 in Blade Material Steel Control Type Pull Chain Drive Type Direct Drive Duct Diameter Not Applicable Exhaust Airflow @ 0.000 in SP 1 100 cfm For Cut-Out Height 14 in For Cut-Out Width 14 in For Maximum Wall Thickness 5 in For Minimum Wall Thickness 5 in Frame Finish Powder Coated Frame Material Steel Guard Finish Powder Coated Guard Material Steel Guard Type Intake Housing Material Steel