Flue Flow with Appliance Fitted - Live Video Lecture

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There’s a lot of confusion surrounding the flue flow test. It’s mainly because people don’t really know why they are carrying it out.

It is PRIMARILY a test of the “integrity of the flue”. Integrity in this case means the “structural soundness and suitability” of the flue


This means that you must check the flue from the appliance all the way to the terminal for any leaks or breaks and ensure that it will remove ALL of the products of combustion

The easiest way to do this is to see if it will handle a specific volume of smoke without spilling the smoke back into the room or letting it leak out of any holes or joints.

The quantity of smoke is written down, in law, as 5 metres cubed of smoke.

But they don’t allow you to just make that amount of smoke over whatever time you want, if they did that you could spend all day with a small bit of wood letting wisps of smoke go up the flue. No, they say that you have 30 seconds to make the smoke and that the flue must not leak while the smoke is passing along it.


The appliance must be switched OFF and the doors and windows closed.





Comments

  1. RF Plumbing & HeatingDecember 28, 2022 at 8:59 PM

    Hi Nice Blog, Our Gas Engineer Glasgow can offer our services for all boiler repairs, boiler installations, new boilers, and central heating services across Glasgow with our 24/7 emergency services.
    Gas Engineer And Plumber Glasgow

    ReplyDelete

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