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Aye, but working off what I know right now. There is a wired thermostat in the hall of the new place. No idea how the hot water system works. So can use the starter/wired kit easily until we scope out what's needed for hot water. That bit doesn't seem to be as much of a deal by itself so won't be missing out as much if I wait to buy that by itself.
stevo_com-
You need to have the extension kit for the TRVs though - otherwise they won't call the boiler.
They'd just open & close the radiators, and only when the boiler is on (via another programmer I guess) would they heat up. Worse - if they are closed, and the boiler is on, you'd be circulating and heating water through a tiny loop.
NotThamesWater
The extension kit does hot water by default, I thought