Thermostatic valves on radiators VS single central thermostat

mambo

Our house has gas for central heating AND hot water, which are on a timer.

It doesn't look like they can be controlled independently, so they are either both on or both off :-(

(The hot water tank also has ON/OFF and SINK/BATH switches, so it looks like it may be an electrical immersion tank as well, though I haven't tried the ON switch yet to see what it does).

The downstairs radiatiors have thermostatic values, but the upstairs radiators just have regular values. This can mean that upstairs sometimes gets too warm, if the heating is on for a while. Whereas downstairs the thermostatic values keep the temparature comfortable.

So it looks like we can either:

* fit thermostatic values upstairs (I assume the radiators can take them - they look like bog standard radiators, though the valves are vertical, whereas the downstairs thermostatic valves are horizontal).

OR

* fit a central thermostat (either a simple type, or a fancy "smart" thermostat like Nest or Hive) which will switch off the heating completely when the temperature wherever the thermostat is located reaches a set level. But would this always turn off the heating of hot water as well?

Any suggestion which option is better?

youtheman

Cheapest option is to install TRVs in the upstairs rooms. I have TRVs in all rooms in my house EXCEPT for the rooms with the thermostat (you can't have 2 separate devices trying to control the temperature).