Is this the right place for the Central Heating Thermostat

[kevinyork]

Ok. This is a very long story however in brief.....

We moved into a new house 15 months ago. The heating system had been badly designed and eventually the NHBC took over the issue and came in and rectified it (we had to move out for a week whilst an army of people came in to sort it). We now have a nice warm house. One issue though. We have 2 zones, downstairs is zone 1 and the 1st and 2nd floors are zone 2. The wall stat for zone 2 is in the main bedroom. The radiator in that room had a TRV on it and the NHBC took this off as they said you should not have a TRV in the room where the wall stat is.

Now the problem is this. All the other bedrooms in zone 2 have TRVs. However, because Zone 2 is switching off when the main bedroom is reaching the right temperature, this switches the heat off from the other bedrooms which means they dont get warm enough. The only solution is for us to turn the wall stat up really high in the main bedroom so the other bedrooms can get to temperature and are then controlled by their own TRVs. This leaves the main bedroom far too warm and we have to open windows in that room which seems stupid.

Does this sound right? Should the zone 2 stat be in the main bedroom or should they have put it in the first floor landing for instance or is there any other way round this?

 

[sloppytom]

It would prob be better on the landing

 

[ajrobb]

The room thermostat needs to be in the coldest room in the zone. What you might try is closing the lockshield valve on your main bedroom radiator so that the bottom of the radiator is much cooler than the top. This will reduce the output of the radiator, allowing the other rooms to warm up. Unfortunately, you will probably get some flow noise.

I'd be wary of putting the thermostat on the landing as that usually gets a lot of heat from the hall.

While the NHBC are involved, you might complain to them that the radiators in the other rooms are too small or the radiator in the main bedroom is too big.