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
Last night it was on Weather Compensation, no setback.
Well, I will have one last attempt. Most of your theory doesn't fit the data. In the most recent chart I posted, which clearly shows cycling, the OAT ...
But how does it measure, and respond to, the demand? And why is it currently (if my above assessment of what the data represents) choosing to run at '...
This is the point that I failed to get across to @derek-m, whether we like it or not, as far as the heat pump is concerned the OAT, is what it is wher...
But based on what? At any one point in time, the OAT is fixed, the Set LWT is fixed (by the WCC or because the heat pump is Fixed LWT mode), but what ...
@derek-m - let's not start rowing again, but what exactly does 'no problem' mean or contribute?
Unfortunately there is no way I can run with such a low LWT and have a warm house. This was known about at design time, having a small listed building...
I am still unclear how practically to do this. The OAT has been falling overnight, and is currently 4 degrees, ie approaching the defrost cycle range....
Yes, it is in one of the modbus registers, and I just collect it as I would collect any other register value. I'm guessing it is set by an algorithm t...
I thought the intention with the Met office data was to verify the accuracy or otherwise of the Midea OAT, and if it passed muster then it could be ac...
I had considered something along these lines, but came to the conclusion that it needs a free flow of air to reflect the local air temp. It has 5V goi...
Yes, the real problem is the cycling, even at OATs that should have a steady LWT. Below 5 degrees OAT it will defrost cycle, above a certain OAT it ha...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Adventures in heat loss calculations
@cathoderay @jamespa Unfortunately, there was a sli...
By Rob of York , 3 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 , 24 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
