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Flue liner - yes or no?

  • 11-09-2009 9:28pm
    #1
    patd
    Closed Accounts Posts: 11 ✭


    hi

    Can someone please give me a simple yes/no answer to my question and a brief explanation of why?

    I am building a new 2 storey block construction house with standard 8" clay flues. Thinking about putting in a fire insert and and free standing stove in 2 fireplaces.

    My question is do i need to put in a flue liner in both chimneys before connecting up?
    i am getting a lot of conflicting answers so not sure what is the best solution!

    Thanks


Comments

  • #2
    teepee
    Registered Users, Registered Users 2 Posts: 267 ✭✭teepee


    yes .
    why , its good building practice .:D


  • #3
    PeteHeat
    Registered Users, Registered Users 2 Posts: 648 ✭✭✭PeteHeat


    Hi,

    Simple answer is Yes.

    The only inserts I know of that are designed to work in the existing flue is the TR3 and TR4, they are clamped into existing flat front fireplaces with firbacks, while they do have test certificates I expect they are just making to or over the 60% efficiency rating.

    For the rest of the insert stoves I know of they must have a flue fixed to the spigot on the stove, Part J of the building regs is clear about the flues and the connections being socketed facing up and not into the flue.

    One reason is to prevent condensates running down the flue and out onto the connector / adapters as they contain creosote and other tar like substances which are highly flammable.

    If there is going to be a chimney fire it should be contained in the flue and not outside the flue / stove where they are connected to the clay flue, I expect there may be problems with insurance companies paying out in the event of a claim for smoke damage in a house where the regulations were ignored.

    A stove with a 5 or 6 inch spigot is designed that way for reasons of efficiency, imagine a river 5 feet wide suddenly opening to 8 feet wide, the speed the water flows at suddenly drops off to a trickle.

    A chimney works in a similar way, the temperature of the flue gas (smoke) is much lower from an efficient stove than an inefficient open fire.

    If I had more time I would have written a shorter more detailed answer.

    .


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