"Ed Sirett" wrote in message
news
On Thu, 16 Jun 2005 16:44:25 +0100, Doctor Evil wrote:


"John Rumm" wrote in message
...
jon wrote:

What thingy do I need, as Ideal don't make or recommend what to use.
I
basically need something that will let me program the heating and
water
seperately over a 7 day period, the usual stuff like heating on at
7am
off
at 9am, on at 4pm of at 6pm. Also do I need some of room thermostat,
if
so
are there all in one jobbies, programmer, timer, thermo, etc, and
where
should it/they be sited.

I used a Horstman one on my Isar HE35:

http://www.screwfix.com/app/sfd/cat/...12157&ts=72301

Works very well. It has up to six different timed zones in a 24 hour
period, so you can have night time, early morning, morning, afternoon,
early and late evening each at different temperatures if you want. It
is
also easy to override an tweek the temp up or down with the push of a
button.

Stick it in a room with a rad that has two lockshields fitted (i.e. no
TRV). The hall is a common choice - but front room may be good also.
Make sure there are no other frequently used heat sources in the same
room, or else you may find you one nice warm room and a cold house.

No need to worry about hot water, that is allways ready to go on
demand.

It has no optimisation. The Honeywell is a superior unit.
Which is too complicated for 90%+ of customers.
The Horstmann unit is too complex for 40%.

It isn't. Once they understand that they programme in temperatures it is
easy. If my sister can grasp a CM67 anyone can. Two little buttons to wind
the temperature up and down too. If you come in, in a period at the
temperature is set to say 18C, then you just set it to 21C and it sayes
there for that time period. It is simple and effective and saves fuel. I
rate it no more complicated than the Horstman. The Landis & Staefa
optimisation stat/programmer is easy enough too. Landis always have easy to
use products.

The expensive energy managers optimise the on and off between the set
temperature ranges, of which there may be 6 and above. The Building
Research Establishment claimed one model saved about 25% of fuel using one
of these. They are self adaptive in that they learn the buildings moods.

Not going for the optimisation function on a stat/programmer is foolish.