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: Sep 22, 2026
Im not actually sure now what you think we disagree over. All I was doing is outlining a process by which we might, using a combination of experiment...
Here are the results of running the Libreoffice regression analysis on two subsets of the data, corresponding to when there was and when there was not...
I used all the data from the start of the heating season as I did not know when setback was initiated and ceased and was not inclined to inspect all t...
I think there has been some scope creep but much of it (not all, I grant) is very relevant to the actual problem in the title. @derek-m has created...
@cathoderay Having looked again at the graph I'm not sure I agree with your analysis. The lwt achieved appears to be equal to the lwt set, so the hea...
Actually, on second thought, it's the actual temperatures which are measured and reported as integers. Given that those do vary, and given that flow ...
Good point. Depending on how good the control loop is the actuals may be a bit noisy, which on average might improve the resolution, but that's clutc...
To reconcile the figures measured at the heat pump it must be measured at the heat pump. Measuring it at the phe (and measuring dt across the phe) wi...
Manufacturers normally specify if figures are net of defrost. Of course if the tests are done in the arizona desert rather than on a small island on...
I assume your figure, like mine, is from flow rate and dt. If so then they are subject to the same errors/factors. It could be flow rate, it could b...
It uses all the one minute data positive and negative except if the diverter is set to dhw.. Energy for defrost comes from the house so should be and...
SPONSORS
Degrees of Separation
Latest Posts
-
@mrkfm, I’m definitely not trying to put anyone off get...
By Mars , 5 minutes ago
-
RE: Cooling using an air to water heat pump
I agree, which is why I am currently resisting buying a...
By JamesPa , 26 minutes ago
-
RE: Passiv Smart Thermostat - Help & Forum Support
Is there any expected time frame for an update to be ab...
By Singlespeed , 4 hours ago
-
RE: Why are ASHP installs so expensive?
Posted by: @springswood I confess to becoming a litt...
By Rob of York , 5 hours ago
-
Analysis of the economics of switching to an A2W ASHP compared to other heat sources
This post aims to analyse the economics of installing, ...
By Rob of York , 9 hours ago
-
RE: Cooling with air to water heat pumps
@editor does that mean you have to have two separate ex...
By mrkfm , 1 day ago
-
RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
Posted by: @ian-s Could always use the money saved o...
By Rob of York , 1 day ago
-
Depends on what controls the pump! Thats the whole poi...
By JamesPa , 1 day ago
-
The positive reviews keep coming in for Britain's Heat ...
By Mars , 2 days ago
-
RE: Next steps on my ASHP journey: Radiators and Pipework
I have one of these fitted which also allows you to reg...
By Old_Scientist , 2 days ago
-
RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
If they can't don't give up. Heat pumps are, in reali...
By JamesPa , 3 days ago
-
RE: Missing flow temperature in Heat Geek proposal
Yes that's what would happen by turning down the lsv to...
By JamesPa , 3 days ago
-
RE: Grant R290 DHW Cycle Interuption
It looks like some sort of short pre-run. The question...
By JamesPa , 3 days ago
-
RE: Cascade System or larger single unit
@renewables345 I would say if it a new build it’s no mo...
By Aventus Eco , 3 days ago
SPONSORS
