17/09/2026
Ever wondered why we light a fire before carrying out a smoke test?
It’s not just for show! 👀
Pre-heating the flue helps to remove any cold air sitting in the chimney. As cold air is denser than hot air, it effectively blocks the flue, sometimes known as a cold plug.
Warming the flue helps establish a good natural draft before we carry out the smoke test. A good draft reduces the chance of smoke spilling back into the room and gives us a more reliable indication that the chimney is drawing correctly.
It’s one of those small steps that makes a big difference when it comes to safe and effective chimney operation.🔥
