The Broan/Nautilus 180 cfm direct discharge fan helps eliminate humidity from laundry rooms, tobacco smoke from rec rooms and workshops, or cooking fumes from kitchens. The fan is capable of filtering 180 cubic feet of air per minute at 6.5 sones, and the housing adjusts to fit walls 4-1/2-to-9-1/2-inches thick. The fan comes complete with a built-in damper to minimize backdrafts and an 11-1/2-inch square metal grille. The fan is backed with a 1-year limited manufacturer"s warranty.