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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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    • CommentAuthordelprado
    • CommentTimeMar 5th 2018
    Especially if you have a single zone, as I will, for the whole of my ground floor? I understand its conventional to put it in the shared hallway space, but given how much heat is loss upstairs there I would have thought that will lead to overheating the individual rooms.

    Can anyone offer any wisdom?

    You don't - you run from an external Weather Compensation controller....

    You shouldn't get any major change from room to room in a well insulated house but put it in the 'comfort' room if you're worried. In our badly insulated Victorian house I put it in the living room.
    • CommentTimeMar 5th 2018
    You can still adjust the flow for each circuit using the valve on the manifold to make adjustments to the flow rate to each circuit. So if one room is overheating, perhaps due to solar gain you can reduce the flow rate slightly to compensate.
    • CommentAuthorgyrogear
    • CommentTimeMar 5th 2018 edited
    Posted By: Simon StillYou don't - you run from an external Weather Compensation controller....


    As I understand it, one does not (should not...) *HAVE* an underfloor thermostat, one has an underfloor temperature sensor, that transmits to the controller.

    The reason being, the notion of "thermostat + radiant floor" does not work, due to the inertia in the system: the overriding parameter is the external temperature, and the level at which the floor needs to be heating, for best comfort. So the controller talks to the heat source, and the temperature control valves, rather than to the actual floor.

    I have a wall stat in the room with my ufh and works fine
    • CommentAuthorgyrogear
    • CommentTimeMar 5th 2018
    Posted By: VictorianecoI have a wall stat in the room with my ufh and works fine

    No doubt; but I bet it is not talking to the floor !

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