In an earlier contribution to this discussion,
altheman alan@ford50(no spam).freeserve.co.uk wrote:

hi again..what i am exactly trying to achieve..is the following...as
it it a new central heating system to me....i thought that in this
cold weather i would have to put on both HOT WATER & CENTRAL HEATING
switches to run the central heating...but then i thought as i had a
seperate switch for both surely i would not have to switch on HOT
WATER switch to run the HEATING ( therefore saving some money as to
not have to have both on at once).hope you understand what i am
explaining here.but thats the gist of it...many thanks again

Fair enough. Assuming you have independent control - and we still don't
know, because you haven't answered the questions about motorised valves
etc. - you can certainly save money by *not* heating the hot water cylinder.
But you won't then have any hot water available at your hot taps for
washing, showering, bathing, etc.

Assuming you *need* hot water, the best way of saving money is by heating
and storing it efficiently. This means that you need a proper control system
which automatically stops heating it when it gets hot enough - and you need
a well-lagged cylinder so that the water *stays* hot after you have heated
it.

People here can advise you about the best way to control your system - but
only after you've given details of what you've actually got.
--
Cheers,
Set Square
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