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Heating thermostat and building regs ?

Hi guys, maybe slightly off topic.  I have been asked by a customer to relocate her heating thermostat in a new build.  I haven't seen it yet so don't know the full picture but she says it is located in her attic room and doesn't shut off when they want  because it doesn't get warm enough or the rest of the house stays on because it's colder up there, so i am presuming it's a 3 storey house.  It seems a bit odd to me on the face of it, especially as it's June.  i thought each floor should have its own zone and thermostat to comply with building regs, is that correct.  This is just a standard wet system with radiators.

 

 

Gary

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  • Sparkingchip: 
     

    Chris Pearson: 
     

    It does seem to be an odd place to put the thermostat, but whether it complied with building regs must depend upon when it was installed.

    I am not sure that one is required if TRVs are installed.

     

    You need a room stat with TRVs to stop the boiler cycling on an off when the TRVs are satisfied and the water is circulating through the bypass valve or radiator.

    I suspect that it is rare that all the TRVs are satisfied at the same time - a bit like diversity in our world. If they were, and the one radiator (or towel rail) without, or bypass valve were the only heat emitters, the return temperature would shut off the boiler. However, I do recognise that short cycling is not a good thing. We don't have a thermostat upstairs, but it is a gravity system. The worst case is that the underfloor void gets toasty warm, but the heat has to go somewhere so will heat the rooms.

    So do you put the thermostat in the room with the non-TRV radiator, or elsewhere?

Reply
  • Sparkingchip: 
     

    Chris Pearson: 
     

    It does seem to be an odd place to put the thermostat, but whether it complied with building regs must depend upon when it was installed.

    I am not sure that one is required if TRVs are installed.

     

    You need a room stat with TRVs to stop the boiler cycling on an off when the TRVs are satisfied and the water is circulating through the bypass valve or radiator.

    I suspect that it is rare that all the TRVs are satisfied at the same time - a bit like diversity in our world. If they were, and the one radiator (or towel rail) without, or bypass valve were the only heat emitters, the return temperature would shut off the boiler. However, I do recognise that short cycling is not a good thing. We don't have a thermostat upstairs, but it is a gravity system. The worst case is that the underfloor void gets toasty warm, but the heat has to go somewhere so will heat the rooms.

    So do you put the thermostat in the room with the non-TRV radiator, or elsewhere?

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