There are a few methods to control central heating, analogue is best option where it turns the boiler output up or down rather than off/on (digital) and you can have a centralised control
this is EvoHome and it links to the TRV heads. However the point is how much you want to spend. A TRV head which has wireless connection can cost £50 each, but a local electronic head can cost as little as £10 and in the main it is a compromise, so may be one or two linked TRV heads and the rest cheaper versions.
So in theory central heating can be controlled by the TRV, but it has a flaw, the flaw is on a warm day it will not totally turn of the central heating, so we were told to put a wall thermostat in a room kept cool with no alternative heating, and no doors to outside and on ground floor, and it only turns off on a warm day.
The problem is the cost of control can cost more than it will save, so it is a compromise, Drayton Wiser is likely the best, but can cost £1000 in total so I used cheap TRV heads
they cost me £15 each with bluetooth, but that was before Brexit, seems price have gone up.
all boilers can be controlled by any heating control , they are simply an on off switch depending on what you want them to do
Not quite correct, in the 80's the condensate gas boiler was invented, and it gains the latent heat from flue gases, for this to work the return water needs to be cool enough, so that in turns means the TRV is the main control, and this slowly increases or decreases the flow through the radiator. With an oil boiler
@ianmcd is correct, but with gas either it is the water temperature or connected to boiler ebus, the OpenTherm system however is not supported by all boilers, some manufacturers you can only use their own thermostats.
