what does balanced flue mean
Room sealed or balanced flue means that there's a hole in the wall that both draws in air and chucks out exhaust gases in a way that there's no connection with the air in the room.Modern boilers use this system. Source(s):old know all Â· 5 years ago.oom sealed or balanced flue means that there's a hole in the wall that both draws in air and chucks out exhaust gases in a way that there's no connection with the air in the room. Modern boilers use this system. Source(s): old know all Â· 5 years ago.