Our house has a concrete ground floor so all of the downstairs radiators
are fed from various points upstairs. This means that it's impossible to
set up separate upstairs and downstairs zones.

TRVs are already fitted but I would like the extra time control that
zoning would offer.

The only solution I can think of is to install valves on each of the
radiators and control them electronically and/or wirelessly.

Has anyone any ideas/experience?

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F