Broan Roomside Series 80 Cfm 0.8 Sones Ventilation Fan Energy Star Broan Aer80C Roomside Series White 80 Cfm Exhaust Bath Fan, Energy Star Offers Easy, Room Side Installation, With “No Attic Access Required”. Ceiling Mounted Ventilation Fan Features Foldable Mounting Ears And Ez Duct Connector For Easy Installation. New Duct Damper Technology Provides A Tighter Seal, Resulting In Reduced Warm And Cold Air Backdrafts. This Energy Efficient Fan Operates At 80 Cfm And A Very Quiet 0.8 Sones.