Last seen: Sep 20, 2025
@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...
If I understand the graph correctly the 60min average energy out seems to be around 8kW. Is this right?
Thanks for the data. I have taken this and plotted various adjustments. Here are the key results. Each point is one noon-noon measurement. I ...
yes it has thanks. I was apparently logged in, but I logged out and logged back in and this magically appeared
Clearly its either undersized (which is unusual but possible) or badly set up. Installer needs to take responsibility unless someone else did the cal...
Are you sure that the problem with defrost cycling is not caused by the LLH? Two reasons: 1. The LLH will in all probability reduce the FT to t...
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