Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering youāll be able to ask questions, join discussions, follow topics youāre 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: Sep 9, 2026
Thanks for doing the modelling. It is still installed. Could you please elaborate on how why the PHE is the root cause? I don't have an absolute ...
Of course I am sceptical of heat loss calculators - after all, they are classic whatiffery models! What if the walls are made of this and are that thi...
I'm not sure they all are. The hallmark, at least on my system, of a defrost cycle is the LWT falls below the RWT (if you think about it, it does make...
@harriup - thanks, especially for posting the charts. We now have data from three installations, yours mine and @kev-m's, and they all show some form ...
I wasn't suggesting it doesn't match demand in that quote, it fact the opposite, it does match demand in the conditions I was talking about. However, ...
Here it is 24 hours from noon yesterday to noon today:
Will post the data after I have had some lunch.
My point is we are not in these conditions, warm house in mild conditions, where we know about and expect cycling as the only way further to modulate ...
It's not on a graph, it's in the raw data, which appear to suggest my heat pump spends most of it's time running at the 'min' capacity level, even whe...
Certainly, or it could just be my Midea unit. The problem is that unless and until we have more data, we just don't know. I'm hoping others who coll...
I can't actually find any of these settings in the Midea Engineering Data manual. There is something called dT1SH, which 'sets the temperature differe...
Last night it was on Weather Compensation, no setback.
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Adventures in heat loss calculations
I'm still not sure! Consider this chart with an added l...
By cathodeRay , 36 minutes ago
-
I bought it, read it, enjoyed it. Despite my earlier c...
By JamesPa , 3 hours ago
-
RE: Tell us about your Solar (PV) setup
Our PV set-up has moved over time. Warning this is a sh...
By Judith , 16 hours ago
-
RE: Where heat loss surveys seem to go against practical reality
@cathoderay @jamespa I've managed to get some nice re...
By Rob of York , 23 hours ago
-
RE: 7kW EV Charger Options Advice
Doh, not sure that I was thinking straight there, less ...
By Rusty , 1 day ago
-
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
Iām really liking reading through this thread and the r...
By Judith , 1 day ago
-
Thank you @trebor12345
By rgabor , 1 day ago
-
Panasonic Free Multi Z and Etherea Internal units.
My prospective installers have suggested the Panasonic ...
By Toodles , 2 days ago
-
RE: Next steps on my ASHP journey: Radiators and Pipework
Great. You just need to find a way of cranking up your...
By JamesPa , 2 days ago
-
RE: Heat Pumps Without Grants: Would You Have Installed One & Will You Now?
We had two heat pumps installed without Govt funding. H...
By Rob of York , 2 days ago
-
My Adapt is finally installed and running! Almost a yea...
By tomasmcguinness , 2 days ago
-
-
RE: Being screwed over by Volkswagen Audi Group
Thanks, @batpred. That integration is the one I have in...
By Majordennisbloodnok , 5 days ago
-
RE: How Accurate Is My DIY Heat Loss Calculation?
@batpred I suspect it will be more this year. I had 9 ...
By AndrewJ , 5 days ago
SPONSORS
