In an earlier contribution to this discussion,
xena wrote:

Or, like you said, a programmable thermostat, though I'm not sure
what one of those is. Gonna look it up now.

A programmable stat is a combined thermostat and time clock, which enables
you to programme it for different temperatures at different times of the
day. You would really need one for upstairs too, to be useful. You would
then leave the heating on the 'continuous' setting on your main timer, and
use the programmable stats to determine when it *actually* comes on and off.
You can set different time/temperature profiles for upstairs and
downstairs - which can sometimes be useful.

When you've finished all this, you'll have such a wonderful heating system
that you won't want to sell the house. g
--
Cheers,
Set Square
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