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: Mar 21, 2026
Hi Ray Looking at your chart you seem to have a stark increase in energy use for only a small drop in outside ambient. IE dropping from 10c to 8c ap...
@cathoderay Thanks for your observations. I need to correct a chart comment I made on my last post. The pink coloured crosses are December data not Ja...
Over 50 trials of setbacks vs continuous operation. Here is a scatter graph of this winter operation of our Ecodan 8.5 to date. The setup is a Ratia...
Sorry, I have to say this post simply serves to muddy the waters. I agree that the time of use tariffs may produce savings as a tactic. But in no w...
James / Derek. Over the last year or more there has been a lot of debate and speculation about the optimum flow rate for the Ecodan range. Some people...
@jaket we have decided a bit of cycling (but not too much) when it’s 10 or 12c is better at achieving a high CoP and minimise KWh consumption. The q...
thanks for your response. It’s not easy to compare like for like installations since anything can be different between personal choices and preferred ...
Very interesting. @mike-patrick Interested in how big your house is since output is bigger than us in our 180 sq mtr house. Also do you have low los...
Hi @jake. I’ve started getting a bit of cycling since we have had 12c OAT. we get about 2 or 3 cycles an hour. Auto adapt does help a little by reduci...
I had wondered if you have a list of your radiator sizes and how large your underfloor heating area is since a small emitter capacity can cause cyclin...
Hi @gary I’ve located a copy of it I think it was published last autumn. LATEST ECODAN DATA BOOK VOL6
apologies. I have to make a comment on flow rate. Jake’s HP is a 6kw it is not an 8.5 model and it’s flow rate recommendation is around 11 LPM. I also...
Latest Posts
-
RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@swwils mine is mostly off now. Hot water for an hour ...
By AndrewJ , 6 hours ago
-
RE: Setback savings - fact or fiction?
I too agree with what you say, and am grateful to you f...
By cathodeRay , 7 hours ago
-
RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 8 hours ago
-
RE: Forum updates, announcements & issues
I have been doing a lot of work on the site lately and ...
By Mars , 8 hours ago
-
@majordennisbloodnok good advice, thanks for that.
By David999 , 12 hours ago
-
RE: My Grant R290 9kW Heat Pump Installation
I am following this thread with great interest and than...
By TaffontheTaff , 14 hours ago
-
RE: Sizing an ASHP; Heat loss and kW
You can't measure heat loss with a website. But you ca...
By JamesPa , 1 day ago
-
RE: Estimating true heat loss from twelve months of consumption data
@ian33a — I have a sort of residual interest in this pr...
By cathodeRay , 1 day ago
-
Hi, Thank you. So its a Daikin Altherma 3M...
By Lbart68 , 1 day ago
-
I have a Contactum CU. Would the below RCBO (descriptio...
By Batpred , 1 day ago
-
RE: Samsung gen 7 HP 12kw - auto control issue and water law
@chainreaction Agree with @broadsman , it seems many ...
By Batpred , 1 day ago
-
RE: Anyone concerned about GivEnergy?
@transparent Thank you and appreciate your timely reply...
By SUNNYSKIES , 1 day ago
-
RE: Grant Aeona 3 R32 cycling with weather compensation.
The hot water heating looks normal. The heat transfer ...
By GrahamF , 2 days ago
-
RE: A2A vs A2W: Which Heat Pump Would You Pick?
Good questions @temperature_gradient. My understanding ...
By springswood , 2 days ago
