Last seen: Sep 14, 2025
Yes, I find that analogy works for me too, though I add fuel burnt: Think mph is kW, whilst miles travelled and fuel burnt is kWh. I find it furth...
@derek-m - yes, we have to stick with physics (Newtonian, not quantum) and the real world observations and data, and not forget the Holmesian dictum t...
Coming back to the calculations, this may well be the case. If we assume the heat loss is linear, ranging from 12.3kW at -2 ambient, and dropping to z...
Yes! But I'll come back to that if I may. Answers to the questions in your next and post: Continuously, as long as the room stat is calling for he...
@derek-m - I will have another close look. The only other connection to the rad circuit is the connection to pressurise it (it is a closed system) and...
@derek-m - thanks, that would be very welcome, and I am sure others will welcome it too. All the rads have TRVs and they are all definitely open (th...
@ronin92 - I do have a multi-meter with a thermometer scale using a thermocouple to take the readings. Putting that inside the insulation foam pipe wr...
@ronin92 - these temps are not easy to measure accurately. The clip on thermometers are typically +/- 5 degrees so not discriminating enough. I use a ...
@derek-m - Thank you for the detailed explanation of the principles behind how a PHE works. That is indeed my understanding of the principles, though ...
@derek-m - yes, we did, but didn't get to the bottom of it, largely because there weren't cold enough ambients to test the system. @kev-m - I agree ...
@kev-m - that's interesting, and makes sense, and fits with what I observed about the power reading in the Midea controller, around 5kW when it was on...
@editor - useful images. Using my rather more basic IR thermometer I continue to have a roughly 5 degree difference between the top and bottom of most...
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RE: Help me keep the faith with my air source heat pump installation
Er true, it should have read l/hr!
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