On Mon, 23 Feb 2009 08:06:53 +0000, Andrew Gabriel wrote:

In article ,
jives11 writes:
Hi,

I'm starting to see a system advertised called House tech, which
consists of motorized TRV's and a room thermostat. Both the TRV
'head' and the stat are battery powered and communicate wirelessly, so
the stat part does not have to be physically close to the radiator. I
wonder if anyone has any experience of these ? I think the system
comes from Germany.

I ask because generally I find that TRV's don't work especially well.
I have two teenagers who spend a lot of time using PC & games consoles
in their rooms which get very warm, while the rest of the house maybe
on the cool side. A smarter TRV system i.e one that works , would seem
a good move.

Might just be that your TRV heads are worn out.
You could try renewing one of the heads, to see.

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Some makers ('Optima' and possibly Wickes) state, "... the head and body
must not be separated, they are a calibrated pair and must be used with
each other."

If a new head is fitted it might give misleading results, although it's
difficult to see why calibration should be so important in this case.

Cic.

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