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 20, 2026
Thanks for recent data. Here are some more questions. I apologize, I am not using DHW and I am not familiar with schedules. What is your exact sc...
@benson Thanks for new graph. Initial reaction is that fluctuation of the various quantities is quite inexplicable and needs some more parameters to b...
@benson Indeed they do fluctuate more than I would expect. Perhaps a plot with set LWT, OAT and IAT would be more enlightening.
@benson I see, I misunderstood obviously. So you set LWT according to OAT, but not in WCC mode. You don't intend to use IAT using similar logic, I p...
I meant the following rule you mentioned using: "second automation will adjust this outlet flow temp value if needed. For example, if the IAT is out...
What you are actually implementing is a closed loop control idea, rather than the "open loop" WCC curve approach. It has been my postulate all along t...
Well, because there is a considerable delay in sensor information. This could have a serious effect on the performance of the closed loop system, such...
Hi all. I have also observed the strange behavior regarding LWT and T1s. By monitoring the relevant values I noticed, that if I calculate the T1s base...
@cathoderay OK, thanks all. Much as I thought. I am using the same logic. As for the Midea expert, I very much doubt there exists one.
Hi all, I need your help again, because of the lack of clarity of Midea'a manuals. Here is my question: If one employs an external room thermostat (...
@jamespa My god you've gone into great depth to make things work for you. I wonder why this limit is not adjustable. Anyway, thanks again, I am not ...
@jamespa Thanks for replying. Fan coil units in Greece are indeed used for cooling in the summer, with the appropriate hardware. The main reason I a...
Latest Posts
-
RE: ASHP Capacity loss with aging
This is a good question. The short answer IMO is yes, c...
By Mars , 8 hours ago
-
RE: Daikin Altherma 3 with Fan Coils in Puglia (Italy)… Sanity Check on System Operation
Welcome @simon_jm, and this is not a dumb question at a...
By Mars , 8 hours ago
-
RE: Loud noises in the night - and one for the toolbox?
Brilliant bit of lateral thinking, and a useful one to ...
By Mars , 10 hours ago
-
RE: Setback savings - fact or fiction?
Yes, also the higher OAT end is possibly a smidge high ...
By RobS , 10 hours ago
-
RE: UK warm homes plan - how can it be delivered?
@bobflux My view is that regulation for consumer pro...
By Batpred , 13 hours ago
-
Hi Mars, I've sent you a request to connect me with a...
By sttpd1917 , 13 hours ago
-
RE: Sizing an ASHP; Heat loss and kW
Annual consumption is almost certainly better than an E...
By JamesPa , 17 hours ago
-
Grant Aerona R290 (15.5kW) - How is DHW Target Temp calculated?
Hello all, We have just had a Grant Aerona R290 insta...
By TaffontheTaff , 19 hours ago
-
RE: Advice on Vaillant Sensocomfort
The latest Vaillant announcement I saw said that they w...
By JamesPa , 23 hours ago
-
RE: Debugging my legionella immersion heater
I notice this (66 is rather hot) with my legionella cyc...
By JamesPa , 1 day ago
-
RE: DIY Heat Pump Installations: Navigating Legal and Regulatory Hurdles
@transparent I thought you would spot that wind turbine...
By Batpred , 1 day ago
-
RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@swwils there is no logic to oversizing a heat pump. It...
By AgentGeorge , 2 days ago
-
RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 3 days ago
-
RE: Forum updates, announcements & issues
I have been doing a lot of work on the site lately and ...
By Mars , 3 days ago
