Also, on another post I did earlier, I asked about having different locations as zones, each with a separately programmed temperature (never got a definitive answer)

zone 1: towel rads, always on 24x7x365
zone 2: upstairs, warmer 24x7xwinter only
zone 3: downstairs, cooler than upstairs 24x7xwinter only

If I had such a system, would I want/need TRVs on each rad? How much would such a programmer cost?

Thanks!

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