House Tech wireless TRV system ?

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. They claim that the units connect to a wide range of TRV fittings - you remove the top pice. Not sure if my Drayton 'Lifestyle' is the same as the Danfoss fitting they support.
I have no connection with HouseHeat - it just seemed like it might be a good idea , assuming it works and you don't have to spend your life replacing batteries
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Might just be that your TRV heads are worn out. You could try renewing one of the heads, to see.
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Andrew Gabriel
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On Mon, 23 Feb 2009 08:06:53 +0000, Andrew Gabriel wrote:

=========================================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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He said his are Drayton. They seem to be very good about supplying new heads for valves they stopped supplying years ago.
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Andrew Gabriel
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Calibrated to what, I wonder? Since all the ones I've seen don't have actual temperatures on them. Apart from the anti-freezing setting, I suppose.
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Dave Plowman snipped-for-privacy@davenoise.co.uk London SW
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On Mon, 23 Feb 2009 15:32:01 +0000, Dave Plowman (News) wrote:

========================================The Optima version has numbered settings 1 - 6 with intermediate marks between the numbers and the manual gives a range of actual temperatures for each major marking. The manual is also quite emphatic about the calibration - "... the head and body MUST be used in conjunction with each other." It seems rather bad marketing to make head replacement impossible in the event of failure unless they offer a re-calibration service with a replacement head.
The Wickes version appears to be their own brand version of the Optima judging by the installation guide.
Cic.
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http://www.house-intelligence.co.uk/department/househeat_products /
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In article

Have you actually measured the room temperatures before the kids start playing and after they've been doing so for a while? Are the rads in that room shutting down? It's just that the body isn't a good judge of absolute temperature - it depends on lots of factors which a thermostat can't take into consideration.
If the TRVs aren't maintaining the temp you want have you tried changing the orientation from vertical to horizontal, say?
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Or checked that they work at all? The valves can stick, though IME they tend to stick closed.
I've generally found that TRV's to work pretty well, but they won't stop a room getting hot from otherways.
And I assuem the TRV's are turned down ? I'd turn the trv right off and see how it goes.
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Chris French


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Indeed. Hence my point at actually measuring the temperature of the room empty and then after it's been in use some time, and making sure the rad has shut down. A radiator can only heat the room - not cool it. ;-)

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