In article , Mike
Hibbert wrote:
I am looking at the CM67 - RF from Honeywell

http://www.discountedheating.co.uk/s...atalogue_Room_
Thermostats_by_Honeywell_1184.html as I really like the idea of having
the house warm up by a given time rather than coming on at a set
time. The house can get chilly sometimes and quite warm at others,
this would be a good feature. Has anyone tried one of these and
have any views?

We have a non-optimising CM67RF in our church and it works well - it
replaced another make, whose name temporarily escapes me, which had the
unfortunate habit of dropping the radio contact and not restoring it:
bad news in a church when you walk in at 1010 and it's stone cold.

At home I've got a non-RF optimising CM67 but I've just killed the
optimising bit (it's an installer-configurable setting). It was
probably doing what it claimed but I would find the heating running
when IMO it was unnecessary: for me, if I walk in and the rads are warm
and the temperature is increasing I don't really care whether it is 17
or 21. YMMV: as the optimising versions are only a few pounds more and
(as I have done) you can kill it later, give it a go.

--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser http://www.sda.co.uk/qsedbuk.htm