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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Heating and cooling: RF or Smart Thermostat for Heat Pump?

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    When heating season is on I leave my heating on 24hrs a day as I use a heat pump.

    The RF stat I have has served me well, a Danfoss Tpone with an RX1-S receiver. However the receiver has packed in and a replacement is £30

    Can anyone recommend a decent one that is RF or smart?

    I liked the controls on this one as I could limit the temperatures so my missus couldn't go past 21c

    Any thoughts on a half decent but cheap model?
    • CommentAuthortony
    • CommentTimeOct 17th 2019
     
    i quite like honeywell 907 which comes with a wireless version.
    • CommentAuthorphiledge
    • CommentTimeOct 18th 2019
     
    +1 for the CM907 and Im pretty sure it allows you can set an overall temp limit. All ours are hardwired so I cant comment on RF features!
  4.  
    Posted By: VictorianecoI liked the controls on this one as I could limit the temperatures so my missus couldn't go past 21c


    Some thermostats have a "wife mode" - whereby you can program how much the displayed temperature is above (or below) actual ;) ;)

    Paul in Montreal.
    •  
      CommentAuthordjh
    • CommentTimeOct 18th 2019
     
    Posted By: Paul in MontrealSome thermostats have a "wife mode"

    Ooh, how awful! :devil: Any links to products?
  6.  
    Luckily I found an old Danfoss Tp9000 in the attic with a wired thermostat. That'll do the trick

    👌
  7.  
    While I've got a thread open, where is the best place to place the stat in this day and age?

    House is a 4 bedroom victorian mid terrace.

    My thoughts are either in the hallway or middle room (play room)

    Lounge is out as we sometimes use the wood burner, kitchen is out as we run that on another zone (underfloor)

    System is ASHP, John Cantor did advise somewhere to open valves fully downstairs and put upstairs on TRV's and try to run the heating for as long cycles as possible but adjust temperature as low as possible.

    Thoughts?
    • CommentAuthorJeff B
    • CommentTimeOct 20th 2019 edited
     
    Posted By: djh
    Posted By: Paul in MontrealSome thermostats have a "wife mode"

    Ooh, how awful!http:///newforum/extensions/Vanillacons/smilies/standard/devil.gif" alt=":devil:" title=":devil:" >Any links to products?


    Ooh yes, do tell!!
    •  
      CommentAuthorDamonHD
    • CommentTimeOct 21st 2019
     
    Historically Part L compliance suggests to put in in a space heated by a rad NOT controlled by a TRV (to close the control loop without the two stats fighting).

    Common practice is the main living area (so that it gets the benefit of that temperature control via the boiler interlock) or the hallway (as often cooler than the rest of the house so in a good place to call for heat from the boiler if any of the house needs heat).

    Rgds

    Damon
  10.  
    I've always thought the hallway the worst place for a thermostat. In most (poorly insulated) houses it's relatively draughty due to external door, open to upstairs (which you may not heat to the same level). Often the radiator is overspecced. One way or another that means the temp in the hall can bear little relation to the temp in the rooms you're actually using.

    We went with Living Room last time round - and we had a gas fire in there as well - as it meant in winter we kept that room warm and saved on heating to the rest of the house.

    But, in a well insulated airtight house where temperatures are much more constant thoughout it surely matters less? We have no internal stat at all - heating controlled via external temp and very low temperature UFH on a heating curve.
  11.  
    If you have a RF thermostat, leave it loose/unmounted and take it to the room you are using at the time. Eg have it in the play room during the day and take it when you go to sit in the lounge in the evening.
    •  
      CommentAuthordjh
    • CommentTimeOct 21st 2019
     
    Posted By: WillInAberdeenIf you have a RF thermostat, leave it loose/unmounted and take it to the room you are using at the time. Eg have it in the play room during the day and take it when you go to sit in the lounge in the evening.

    This is a good idea, and what I used to do, as long as you don't have TRVs on those radiators.

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