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Last seen: Sep 6, 2026
It's the initial precipitous fall in LWT that I'm curious about, blue arrow points to it here: The rest of the decline over time is what I would ...
This is why I mentioned epidemiological observational studies, you have no control over the variables whatsoever. The main way you deal with that nowa...
@bontwoody - thanks for the replies. Inline probes should be accurate, but at the same time such a precipitous drop seems most unlikely, given the...
@jamespa - I suspected all along the answer might be 42. Now we have the answer, we can now work out the question, and I think you have phrased it w...
I think there is at least one thing that isn't right in that chart, the sudden precipitous drop in flow temp when the heat pump turns off. That doesn'...
@iwolf - on my installation there are two flexible connectors connecting the heat pump flow and return to the fixed pipework where it passes through t...
It does correlate well already, at least the OAT/energy out are well correlated, that's the basis of the empirical method of determining heat loss. It...
@paul436 - thanks, that would appear to confirm what i thought.
Not sure, but I think that may be the inline filter by the heat pump is blocked. Mine has a quarter turn valve to close of the pipework, and then you ...
@jamespa - this all sounds do-able, and I agree it is worth a try. To cover your various points: The heating was always on (with or without setback,...
I do already have a lot of data. Since late March 2023, I have been collecting data at minute intervals for all of the variables you mention, apart fr...
Thank you, it is. Your second paragraph also covers something I had been thinking about as well, the situation where a true but small inter-sample dif...
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RE: Next steps on my ASHP journey: Radiators and Pipework
Or where you can fix the pwm% as you can eg with Vaulla...
By JamesPa , 9 hours ago
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RE: Where heat loss surveys seem to go against practical reality
@cathoderay and others. I think there may be some con...
By JamesPa , 9 hours ago
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RE: 7kW EV Charger Options Advice
Thanks. Yes, we have patchy 4G. The only option we had ...
By Rusty , 2 days ago
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RE: Being screwed over by Volkswagen Audi Group
Thanks, @batpred. That integration is the one I have in...
By Majordennisbloodnok , 2 days ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
@batpred I suspect it will be more this year. I had 9 ...
By AndrewJ , 2 days ago
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RE: Surface mount or bury primaries for heat pump installation?
@jamespa It's rusting 🙂
By tomasmcguinness , 2 days ago
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RE: Glass lined Cylinder for private water supply
Thank you, once again, for your replies. Yes...
By ian33a , 3 days ago
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It’s been out a few days and Amazon has already attache...
By Mars , 3 days ago
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RE: Missing flow temperature in Heat Geek proposal
Yes, and this is another point I agree. We did find a f...
By Batpred , 3 days ago
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
A very good point. In effect, the DHW pipework is an em...
By cathodeRay , 3 days ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 Here are those same three month periods for 202...
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RE: Adding additional Solar Panels to a DC coupled battery system
@transparent thank you for your reply above. As alway...
By Old_Scientist , 6 days ago
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RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 1 week ago
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