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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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    • CommentAuthormarsaday
    • CommentTimeSep 10th 2019
    Are RHP's safe ?

    My daughter has a new classroom this year and it is a high tech portacabin (think grand designs posh shed).

    The heating is four radiant heat panels on the ceiling.

    As far as i understand they are safe, but another parent in the class is worried about them. Apparently in Russia they have a bad reputation.

    Is there anything to be concerned about ? I really doubt the school would choose this type of heating if there were some health issues. Thought i would check here as you are a knowledgeable bunch.
    • CommentAuthorCWatters
    • CommentTimeSep 11th 2019 edited
    I can't think of any health issues. Radiant Heaters emit infrared radiation which sounds scary if you don't know that its just an invisible form of light. Anything hot emits infrared light... the sun, cars, kettles, even humans. Chances are your TV remote control also uses infrared light to change channel. My guess is that the word "radiation" is particularly scary in Russia.

    The other possibility is that safety standards, including those for electrical wiring, are much worse in Russia than they are here, so perhaps they have had fires or the things have fallen down?

    One concern is that radiant heating is sometimes used for hard to heat, badly insulated buildings, such as garages where the doors are opened a lot to let cars in and out. So it would be interesting to know how well insulated these cabins are. Perhaps storage heaters on E7 would be cheaper to run, use less electricity, less global warming... Oh wait that's a long term health issue.
    • CommentAuthorphiledge
    • CommentTimeSep 11th 2019
    I guess being fitted to the ceiling keeps potentially hazardous electrics away from inquisitive fingers. It probably gives a little more useable floor space too
    • CommentAuthortony
    • CommentTimeSep 11th 2019
    Also maximises heat losses by having something hot where heat losses are high, possibly below a flat roof, ntetesting pic if it snows
    • CommentAuthorbarney
    • CommentTimeSep 11th 2019
    Do we know if they are electric radiant panels - they could be LTHW

    Pretty common in schools - and very common in hospitals (particularly as most occupants are lying down and lightly clothed)


    • CommentTimeSep 11th 2019
    LTHW for anybody else who like me didn't know means Low Temperature Hot Water.

    It doesn't make any difference what the source of the radiant heat is though. It's all the same infrared radiation.

    I think the point of radiant heaters in an intermittently heated building like a school classroom is that it heats the occupants and surfaces first and doesn't require the building itself to be warmed up, so they save energy over a strategy that involves storing energy and heating via convection etc.

    In hospitals I expect they are additional to building heating in order to adjust the radiation balance such that stationary, lightly clothed patients can remain comfortable even whilst the air and building temperature is low enough to allow fully clothed staff to work around them.
    • CommentAuthorMike1
    • CommentTimeSep 11th 2019
    Posted By: marsadayAre RHP's safe ?

    Entirely safe provided they've been attached properly...
    • CommentAuthormarsaday
    • CommentTimeSep 12th 2019
    Thanks guys.
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