"Michael Chare" wrote in message
...
"Doctor Drivel" wrote in message
eenews.net...

wrote in message
...
john wrote:


"fredbloggstwo" wrote in
message
...
Hi All,

I am looking for a way to have a night and day setting for the hall
CH
thermostat with the (obvious) ability to set the switch over times.

Does such a device exist? If so, do you have any recommendations
and is
it a
straight substitution for the usual Honeywell unit?

Thanks and regards, Mike



Try one of these - superb:

http://www.screwfix.com/app/sfd/cat/...12157&ts=17357

I don't know what these ones are like but the earlier smaller
Horstmann
progstats were a PITA to use. Sunvic do a nice setback thermostat type
(where you set two temperatures and set times at which it goes from
one
temp to theother) but if you want to set multiple different
temperatures I
suggest the Honeywell CM67 which is easy to program and to adjust in
use,
if you need to. RKM Heating Controls (now called something like
heating
controls online) do the best price I've found for these.

Always get the CM67 with the optimisation function.

Unless you have a gravity hot water system, in which case you would
likely be
better off with a Danfoss TP9.
(if you use a CM67 with a gravity system you would need to leave the
boiler/hot
water on all the time, as the hot water is typically on whenever the
whenever
the programmer says the central heating can be on.).

A CM67 with optimisation will work very well with a system with gravity DHW.
You need to understand how it works and the also the CM67.