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    • ugm1dak
    • By ugm1dak 13th Feb 18, 4:02 PM
    • 8Posts
    • 0Thanks
    Underfloor heating - best way to control
    • #1
    • 13th Feb 18, 4:02 PM
    Underfloor heating - best way to control 13th Feb 18 at 4:02 PM

    I'm looking for a bit of advice about underfloor heating. We moved into a new build house 2 years ago which has wet underfloor heating downstairs and radiators upstairs. There is a wall thermostat (non-programmable as far as I can tell) which controls the underfloor separately which I understand is usual.

    We recently bought a Nest thermostat which is obviously quite expensive. When it was installed we were disappointed to learn that it would only control the upstairs radiators, most of which are off as the house is pretty warm and we don't use a lot of the rooms at the moment. On speaking to a plumber he said if we wire the thermostat downstairs so the zoning valve is open, disconnect this from the boiler so it doesn't fire, then the Nest thermostat will control both. He did this a few days ago.

    This has been the situation for the last few days and now the boiler is on pretty much all the time but the temperature downstairs is cold. I've asked the plumber to come out again to reconnect the old thermostat. I wonder if there is an additional valve or pump which isn't working since the old thermostat was disconnected?

    Anyway, my question is, is it worth buying an additional smart thermostat for the underfloor heating or will it just be on a lot of the time anyway? I have read a lot about this over the last few days and there seems to be a suggestion that it is more efficient to keep underfloor heating on at a set temperature due to the lag time for it to heat up. In such a case is it better to use the old thermostat much like a switch and turn it up and down a bit when we want it to be colder or warmer? There doesn't seem to be consensus about this and I was just wondering what people's experiences were.

    Any advice would be gratefully received.
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    • Alex1983
    • By Alex1983 13th Feb 18, 4:30 PM
    • 807 Posts
    • 473 Thanks
    • #2
    • 13th Feb 18, 4:30 PM
    • #2
    • 13th Feb 18, 4:30 PM
    You need a multi zone system, I don!!!8217;t know if nest supports multi zone, hive does, you need a thermostat for each zone valve. I have 4 hive stats, 1 for each zone.
    • missile
    • By missile 13th Feb 18, 10:50 PM
    • 9,378 Posts
    • 4,651 Thanks
    • #3
    • 13th Feb 18, 10:50 PM
    • #3
    • 13th Feb 18, 10:50 PM
    I have hive system with one controller for underfloor heating in lounge and another controller for radiators in the rest of the property + hot water.
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