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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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    Can anyone recommend a supplier of split air to air heat pumps? For DIY install...

    I think it would need to have R129 to be able to be self installed?
    So nobody has bought one recently and can share an experience?
    • CommentAuthorRobL
    • CommentTimeMay 29th 2021
    Did you mean R290 (propane)?

    There are quite a few videos on youtube showing building/installing R290 systems etc. The Ecorenovator forum has a few too. It's legal diy as R290 isn't a global warming problem - but frowned on as it's dangerous.

    I'm looking myself - although I much prefer the idea of a monoblock than a split system, as I don't like the idea of propane indoors - and if it's diy there's less to get wrong. I appreciate that the monoblock has water outside, so there 's likely to be an additional heatexchanger and glycol and an additional pump, or loads of glycol.
    • CommentAuthorEd Davies
    • CommentTimeMay 29th 2021
    Is there such a thing as a monoblock air-to-air heat pump?
    • CommentTimeMay 30th 2021
    Posted By: Ed DaviesIs there such a thing as a monoblock air-to-air heat pump?

    There used to be, certainly. Ugly boxes the size of a large microwave that were mounted through the windows of millions of flats all across Asia. Incredibly noisy.

    Apparently they're still a thing https://www.aircondirect.co.uk/p/1189660/12000-btu-through-the-wall-window-inverter-air-conditioner https://nymag.com/strategist/article/best-window-air-conditioners.html
    • CommentAuthorRobL
    • CommentTimeMay 30th 2021
    Ahhh - I skimmed over the a2a and read a2w, reading what I wanted!
    I think this one is r290, though it just says HCFC free in the link:
    Nb: for longest life I think it probably should be installed using a vacuum pump although they do say you can do it without.
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