Broan 505 Vertical Discharge Utility Fan, 8-Inch 180 CFM 6.5 Sones, White Plastic Grille N/A Imported 180 CFM 6.5 Sones Installs easily between ceiling joists Fits 8 inches round duct Built in damper minimizes backdrafts Eliminate humidity from laundry rooms, tobacco smoke from rec rooms and workshops, or cooking fumes from kitchens with Broan's high-efficiency utility ventilators