Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!
Last seen: Nov 11, 2026
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...
Difficult to comment. Given the choice I would design for 45 or less and wouldn't accept anyone who won't. I would reject without question anyone wa...
I agree with @toodles. By way of a direct answer to your question, so you have a good reason to reject them and look elsewhere. I adopted the appro...
It provides extra system volume which is useful for defrost but may well not be necessary. Have you any idea what volume of water you have in your se...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Buffer tank on a 2 x 14kw Ecodan system
@fosterl2, ah, that changes the picture somewhat. I’d a...
By Mars , 6 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
Well you have a vibration generator running at some fre...
By bobflux , 9 hours ago
-
RE: Why don't people choose heat pumps?
@susannasaunders The link I have found may provide a li...
By Toodles , 12 hours ago
-
RE: Who's your electricity provider and what's your tariff?
@downfield Thats a decent rate, I’m shocked they hadn...
By Papahuhu , 1 day ago
-
-
RE: Should Households Who Can Afford It Pay More for Energy to Help Those Who Can't?
@batpred I mentioned earlier that targeting the payment...
By Toodles , 1 day ago
-
RE: Adventures in heat loss calculations
@toodles thanks! So as suspected, around a doubling of ...
By SusannaSaunders , 1 day ago
-
Six books in three years and I think I’ve now covered j...
By Mars , 2 days ago
-
RE: Grant Aerona3 13kw - Buffer Tank - Heating Journey
@heymikey Well done in achieving as nearer a match acro...
By Toodles , 2 days ago
-
Grant Aerona - Weather Compensation and Schedules
Im trying to set up a friends Grant Aerona. The WC curv...
By bontwoody , 2 days ago
-
RE: Air-to-Air Heat Pumps & Air Conditioning: UK Heating and Cooling Q&A
@jamespa I agree, the efficiency of Cosy Cooler ought...
By Rob of York , 3 days ago
-
RE: How much of your renewable and home setup would still work if the internet went down?
I think you're right! 🤨
By Transparent , 3 days ago
-
RE: Renewables & Heat Pumps in the News
ECO4 muddies the water somewhat, and then some. I thi...
By cathodeRay , 3 days ago
-
RE: Vaillant ecoTEC Plus - Flow Temp and Set Up
If there is a drain nearby that's exactly what I would ...
By JamesPa , 3 days ago
-
I think that CCGT plant in Lingen is more likely to suc...
By Transparent , 5 days ago
SPONSORS
