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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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    • CommentAuthorgoodevans
    • CommentTimeJul 6th 2017
    I think UFH will be installed in my house - I'm too scared to go without. But I was thinking if for less than a couple of hundred pounds I could install some additional UFH pipes in the clay under my building for summer cooling.

    The heating system would have two modes - one for winter with heat from the boiler/store, one for summer with cool from under the house.

    The water would have to be temperature controlled/blended so that the floor does not get below say 18 degrees C. It would cost little in energy. Summer mode would be turned on/off manually I suspect during heat waves - just a way of importing cool/exporting heat (and, as a bonus, heating up the ground underneath the house ready for winter).

    Is there anything in the clay that would prevent using regular UFH pipes (say 100m in 4 parallel loops) - or should I use blue pipe and have an corrosion inhibitor in the heating system.
    Hi Paul, We do this regularly in new build Passive Houses, it works great.
    • CommentAuthorgoodevans
    • CommentTimeJul 7th 2017 edited
    Thanks for the reassurance VH - is that regular oxygen barrier UFH pipe pictured - or is it mdpe?
    • CommentAuthordelprado
    • CommentTimeJul 8th 2017
    In Germany they put pipes into plaster in wall. I like this idea
    Up until someone hangs a picture up using a nail that is :)
    • CommentTimeJul 9th 2017
    Posted By: GotanewlifeUp until someone hangs a picture up using a nail that is :)

    Yeah, that's what put me off before I discovered the PH idea. I suppose you could limit the pipes in the wall (which are available as a product BTW if anybody's interested) to an area under a dado rail, for example. That would be both an unlikely place to put pictures and an easily followed rule for occupants who bothered to RTFM.
    • CommentAuthorgyrogear
    • CommentTimeJul 9th 2017
    Posted By: djhoccupants who bothered to RTFM.

    LOL :smile:

    I am currently *writing* the manual, for when I'm gone, as my lot are pretty thoughtless, real-time-demand operatives...

    I doubt they'll ever read it...

    • CommentAuthorgoodevans
    • CommentTimeJul 10th 2017 edited
    I've been trying to find some form of control system that I can use for the cool water/summer operation and winter heating. It's always a surprise to me how difficult it is to find generic control valves.

    I will need to ensure that the cool water is not too cool (condensation) and also to set the winter heating temperature to something like 25 - 30 degrees as well as thermostats that will operate for both heat demand and cool demand. Have I missed anything obvious - or is this really leading edge stuff.
    • CommentAuthortony
    • CommentTimeJul 10th 2017
    I use solenoid valves and bespoke computer control.
    • CommentAuthorgravelld
    • CommentTimeJul 10th 2017
    Why should a house need a manual?
    • CommentAuthorgoodevans
    • CommentTimeJul 10th 2017
    I wish I'd realised that when I visited you Tony - I'd like to have looked at that. How much power do your valves draw when 'active' - do you modulate by turning on/off - do you have the valve model numbers etc. Programming is no problem for me - 12v/24v relays would be new to me but doable - mains relays I'm not so keen on.
    • CommentAuthorgyrogear
    • CommentTimeJul 10th 2017
    Posted By: gravelldWhy should a house need a manual?

    For recording important information such as filing plan (location of key documentation - copies of deeds, plans, as-built file, photo-reportage of build, technical literature for systems (MVHR etc.); maintenance periodicities; key parameters such as consumptions, addresses of main interlocutors etc.; purchasing details...

    Most complex systems have accompanying documentation these days...

    • CommentAuthortony
    • CommentTimeJul 10th 2017
    I agree, all houses should have manuals or log books containing important information.
    • CommentTimeJul 10th 2017
    Posted By: gyrogearMost complex systems have accompanying documentation these days...

    The only alternative is a permanent staff, as found historically in ships, houses etc etc.
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