509 : Broan Nutone Utility Through-The-Wall Bath Exhaust Fan, 180 CFM, 6.5 Sones

Through the Wall Exhaust Fan SeriesThe Air King Throught the Wal Exhaust Fan Series features an all metal housing that can be installed into walls 4" to 9" thick and vents directly to the outside. Model: EWF-180Spring loaded aluminum back draft damper prevents drafts from entering back into the room.8" round diameter housing for maximum air flowDirect to outdoors exhaust design eliminates the need for ducting