Last seen: Aug 1, 2025
@hughf - it's painful. The last week:
@togfather - I too have an old stone built home, a cottage rather than a barn, though listed. Unless you have done a lot of insulation and leak fixing...
At the moment (just measured), rads ~47, primary in 53, secondary out 54 degrees (not a typo, either measurement error or some sort of lag effect perh...
A heat pump on the verge of a nervous breakdown: Miraculously, the current actual IAT is only 1.4 degrees below the desired IAT. But just look...
Thanks for such a detailed description in words. It really does help my understanding of what you are doing.
It is certainly interesting that the numbers should be so similar. Looking at the last week's use, to 0700 yesterday (Monday), it is still in the same...
Yes, I came across Raspberry Pi solutions, but it means adding a whole new layer of complexity which I think I could manage technically (can solder wi...
@toodles - yes, that makes sense, though I can't see the LWT magenta line poking out from the bottom of the fourth defrost in your latest chart. It ma...
@scrchngwsl - thanks, though I will need to put my thinking cap on to get my head round that lot! I have thought about how to do this a few time...
I think they are there. I have marked them with blue crosses: The key mark of a defrost is the LWT (flow temp) falls below the RWT (return tem...
Thanks for the kind thoughts. At least it is sunny as well as less humid, and the cold won't last forever.
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You may well be right, @jamespa.
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