Previously I used to run the CH on my old timer and just used the evohome and the radiator controllers as smart TRVs. Now having moved to OpenTherm, my boiler is fired by the Evohome based on actual radiator demand, rather than time. Since the temperature has gone up none of the radiators call for heat and so the towel rails ran cold.
To overcome this, I used the evohome's internal thermostat but with no accuator paired during the pairing process to a new zone. I now use this 'dummy' zone to fire the boiler when I need it, and since all the other zones are shut, it only heats the towel rails.
Just thought I'll put this idea out there.
You could extend this idea to heat any radiators without radiator controllers, if you wanted.
To overcome this, I used the evohome's internal thermostat but with no accuator paired during the pairing process to a new zone. I now use this 'dummy' zone to fire the boiler when I need it, and since all the other zones are shut, it only heats the towel rails.
Just thought I'll put this idea out there.
You could extend this idea to heat any radiators without radiator controllers, if you wanted.
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