On Sat, 01 Nov 2008 09:27:16 +0000 (GMT), Dave Plowman (News) wrote:

I'd say your nighttime setback to 18c isn't enough. Many would find
unnecessarily high when in bed. 15 would be more normal - and a well
insulated house probably won't drop this low anyway even with the
heating off.

Our living room very very rarely gets below 15C and that has 3 external
walls solid stone walls and we are high and exposed. Heat loss is high by
modern standards.

The programable stat is set to 18.5C day, 20C evening and 15C (I think)
night but we actually turn the heating off at night otherwise the creaks
and bangs wakes us up. If you're wondering how I know that the temp in the
living room rarely gets below 15C the AWS base station is in there and it
records the internal temp.

18.5C during the day can be a bit "cool" if the wind is blowing and it's
near or below freezing outside. With elderly, not very active, people it
is very easy to get rather too cold just sat in a chair and not notice it.
20C day is about right, 18C in a bedroom I'd find stifling 15C would be
better but then I'm relatively young with good circulation.

It might best to go with how you feel, if you feel cold or get cold sat in
a sensible amount of clothing then the room needs to be warmer. Use the
actual temperatures as a guide rather than an absolute it *must* be
22.167892C.

--
Cheers
Dave.