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Last seen: Aug 17, 2026
@barrovian1963 yes. Not ideal but not disastrous either. There are tricks to increase the period/reduce the frequency eg increase flow temp hysteris...
A period of on followed by a period of off is one cycle, but only if followed (or preceded) by more on-off periods. One on/off transition on its own ...
Absolutely could be a volumiser and thats what I would recommend if the extra system volume is needed to meet the minimum requirement.
I will answer in a different order in the hope of shedding some light. Before I do though I would make the general remark that, in order to analyse t...
Nothing wrong with a remote on/off switch. I used to use my 40 year old hall thermostat that way when I had a boiler (as a thermostat it was essentia...
You are right, the very low flow temp is the major contributor to good COP. Also, at low flow temperatures, the potential penalty of a buffer is less...
The installers who insist you need a buffer are ones to be avoided. You may need a volumiser which has only 2 ports. These dont suffer the problems ...
OK, let me refine my simplified initial statement. Generally I would recommend that any TRVs except (a) for aesthetic reasons as described above ...
OK that now makes sense, basically both control loops are operating as expected. If you changed the target deltaT to 5 I presume that the heat pu...
@powysperson You don't say what your heating us. If by any chance you have a heat pump don't fit radbots. In most cases don't fit trv tops either...
I agree with the above Fancoiks have a very small water volume and you have a fairly high capacity heat pump in a mild climate. Short cycling is to ...
Sorry I'm still not sure what you are actually observing (what do you see as opposed to what do you think might be the explanation) The heat pump ca...
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