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I am considering having radiator thermostatic valves fitted. I do not understand how they will work in the system I have. Currently the heating system (gas) is a condensing boiler and a Hot water cylinder connected somehow and having a pump, a three way valve and a single wall thermostat...

I can't find the "mark all messages as read" button where is it?

I have a Landis+Gyr 5235a electricity meter in the suppliers box which is showing a display of "red" or at least a display from numeric digital display which looks like "red". This alternates with the normal consumption meter reading. What does this mean?