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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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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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