www.qvsdirect.co.uk do something
called a
TLX Digital Room Stat which is a wall mounted digital thermostat which is
settable from the front panel. It has just a set of relay contacts as an
outut
but I was thinking of using these in each room to allow individual
adjustment
of temperature.
These types are OK for just setting a
temperature in a particular zone or room - once it's reached they
switch.
What they don't allow is the ability to have 15C overnight, 20C in the
morning,
18C during the day and say 21C in the evening (unless you want to keep
pressing
buttons at the appropriate time). Of course, you'd need some way of
controlling the radiator flow in each room to do that.
With something like a DS1820 (or
whatever
code it actually is) you can actually read the temperature. With an
external sensor and some clever software programming, you can start to look
at
some form of optimisation. There is one (amongst others probably)
that
will do this already at http://www.dcd.co.uk
but they are over 300 quid a piece, and with umpteen zones it gets a tad
expensive.
For more information: http://www.automatedhome.co.uk
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