In article .com,
MRodger wrote:
I have been told that it is more efficient from a wear & tear & cost
optimization perspective with a water/rad system to keep the
temperature at a constant degree setting, as opposed to chaning the
temperature throughout the day.

Dunno if there's anything in this theory, but in practice what you're
doing is what most decent modern installations do.
And heating the house to a higher temperature than needed - like say when
everyone is out all day - wastes energy so costs more.

You should also consider fitting TRVs (thermostatic radiator valves) to
all rooms apart from the one with the main thermostat. This will allow you
to set the *maximum* temperature in that room - useful in places like the
kitchen where cooking may already provide all the heating needed at
certain times of the day.

However, these only work (IIRC) if you have a two pipe system where each
rad is connected to the boiler flow and return. A single pipe system where
the rads are all in series would need some modifications.

--
*Hard work pays off in the future. Laziness pays off now *

Dave Plowman London SW
To e-mail, change noise into sound.