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    • CommentAuthorselly
    • CommentTimeMar 18th 2011

    Put down a 6" chimney liner for a woodburner. Intended to put another 6" liner down for an aga which has to go up same chimney but won't fit in chimney. Can I put a t or Y joint in and have the oil fired aga and the wood burner going up the same flue?

    I don't mind about building regs but do want to know if it would work and that is reasonably safe. When they're both running a full pelt may it be a problem?

    • CommentAuthorowlman
    • CommentTimeMar 18th 2011
    I feel fairly sure it isn't allowed, you simply risk flue gasses from one appliance coming out through the other appliance when its not in use, I wouldn't do it. Can't you put two separate liners up the same chimney?
    • CommentAuthorselly
    • CommentTimeMar 18th 2011
    they won't fit and chimney is very tall and ancient.
    • CommentAuthorsune
    • CommentTimeMar 18th 2011
    Bad idea....don't do it regs or no regs. Plus without being to regs your house insurance would be invaild probably...boring but true
    Stoves have a certain flue exit size for a reason. And a host of other reasons.....

    Run one as a twin wall system perhaps?
    • CommentAuthorselly
    • CommentTimeMar 18th 2011
    Yeah ok twin wall it is. i think i can find some twinwall cheap enough
    • CommentAuthorCWatters
    • CommentTimeMar 18th 2011 edited
    Would one 6" and one 5" fit? I think it's allowed by the Building Regs but not by Hetas. Only an option if the stove outlat is 125mm...


    <blockquote>It is in the building regulation guidance notes that the minimum flue size for stoves is as follows:

    up to 20kW burning smokeless fuel - Minimum 125mm diameter.
    up to 30kW burning any fuel - Minimum 150mm diameter.

    If the stove is Defra Exempt and has a 125mm outlet then a 125mm diameter flue may be used. This is a recent update (Oct 1st 2010) to the regs. </blockquote>
    Different country, different regs. Here the typical chimney is brick built and about 20cm x 20cm internal. The regs allow 2 solid fuel stoves into one chimney providing there is at least 20cm vertical distance separating them. I have just this situation with 2 masonry storage heaters and they work without problems. But this regulation is only for natural draft stoves
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