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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.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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    • CommentAuthorDiarmid
    • CommentTimeFeb 27th 2021
    We are intending to add a room onto our cottage. It has a wet UFH system powered by lpg. My question is, is it possible to 'break in' to the loop of UFH pipework of the existing system in what will be the adjacent room and run a new loop to heat this new room? I believe the boiler has sufficient capacity to deal with increased demand.
    • CommentAuthorcjard
    • CommentTimeFeb 27th 2021
    Sure; Tee fittings are available e.g. https://www.ebay.co.uk/itm/UNDERFLOOR-HEATING-16mm-20mm-PEX-AL-PEX-BRASS-COMPRESSION-FITTINGS/321982235054 ...

    I'd consider taking an existing room(s) that are less often used/less important (utility+wc?) or an existing room with two equal loops and teeing them together onto one manifold port, then setting the flow rate on that port to be the sum of what the two were before, then using the freed-up port for the new room so you get independent control of its flow rate..

    ..though all that said, buying another manifold with enough ports and selling the one you have (keep the pump, TRV, bleeder etc) won't exactly be the biggest drop in the ocean of extending a house. Aaand, don't forget that for all the faffing there are also kits available to extend an existing manifold: https://www.ebay.co.uk/itm/Polypipe-UFH-Brass-Manifold-Extension-Kit-PB12736/124513203876 - 40 quid is possibly dear for what you get when you consider that a manifold is usually about 15 quid a port, but the time it saves...
    • CommentAuthortony
    • CommentTimeFeb 28th 2021
    Likely to not work effectively if you break into one loop
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