Matching up new and old trv,s is and always will be a pita as more efficient valves come onto the market the size and design often changes to reflect this . I have hive heating control and fitted 3 hive trv.s and I’m glad I got them free. EDIT I gave up on them and just let the batteries die . Sometimes is just best to keep it simple - I can switch my heating on via my phone so never have to come home to a cold flat or turn it off if I’ve popped out for 1/2 hour but then get delayed..so my advice and my opinion is to fit regular trv,s and set them accordingly. I don’t believe there is any major savings to turning for eg .. 3 of your 10 radiators off unless they’re the size of goal lol
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