Radiator trv's

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thermostat
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In order to make this work, you will have to turn the room stat up to max - so that it never turns the boiler off, and so that the conservatory continues to receive heat.
The trouble with this is that there will be no control over the conservatory temperature. When it gets *too* hot, there will be nothing to turn the boiler off.
A better scheme would be to zone the heating system - having a separate zone with room stat in the conservatory. You can then heat the house and conservatory independently without either getting too hot. If you use programmable stats, you can even heat them at different times from each other should you so wish.
[Have a look at the "S Plan Plus" details in http://content.honeywell.com/uk/homes/systems.htm to see what I mean.
Roger
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Mark Newport wrote:

Put TRV on hall rad, and turn hall thermostat to 'max' and forget it exists.
Leave one small rad somewhere - bathroom? Airing cupboard? without TRV so the pump doesn't stall.

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