Dave Plowman (News) wrote:
In article ,
The Natural Philosopher wrote:
Still has to arrange a LOT of extra wiring somewhere and maybe Motorised
valves.

Indeed. If you split the rest of the house up into one zone at the boiler,
you'd need to run new pipework to the room in question. Only alternative
to that I can think of would be some form of radio linked TRVs on every
rad, centrally controlled. But even something like this exists, it
wouldn't be cheap to either buy or install.


Depends on layout. Sometimes you can find strategic places to put valves
that isolate large sections, but here, its simply not worth it. Need
extra heating over and above the PC kit one or to days a winter only.