Mike Barnard wrote:

The dilemma is whether to zone off the rear two rooms upstairs. The
bathroom and bedroom 2 are north facing and in winter they can be much
colder than the rest of the house. The thremostat and timing controls
are in the open plan lounge; see description below. If the lounge is
nice and toasty, then the thermostat will not be telling the boiler to
fire up. Therefore the water in the pipes will not be heated and
under circulation. No matter how far the TRV's in these rooms open
they will recieve no heat.

One simple solution would be to change the stat for a programmable
wireless one and situate it in the cold bedroom. Balance the system so
that all is well when there are no external influences such as cold
north winds etc. Fit TRVs everwhere else. That way the stat will call
for heat until the coldest rooms are heated, and the TRVs will prevent
the warmer rooms overheating.


--
Cheers,

John.

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