Broan Roomside Series 110 Cfm 1.0 Sones Ventilation Fan Energy Star The Broan Roomside Series 110 Cfm Ceiling Exhaust Bath Fan With Light Energy Star Offers Easy, Room Side Installation, With “No Attic Access Required”. Ceiling Mounted Ventilation Fan Features Foldable Mounting Ears And Ezduct 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 110 Cfm And A Very Quiet 1.0 Sones.