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Last seen: Mar 20, 2026
@pash44pump I don't know the procedures in UK, but in Greece every property has an energy certificate, which is the starting point for heating/cooling...
What are the weather compensation settings ? Are you sure the system runs according to these settings ? Are there internal thermostats at low temper...
Which part of the sentence do you consider complete nonsense: "complicated" or "ineffective" ?
Weather compensation is a complicated and ineffective way to control heat pumps. Your house was OK when you were on oil, because oil heater control de...
But this is the whole point of our lengthy and interesting conversation. At this point, I owe to apologize if my English sounded a bit hostile, this w...
@jamespa There are numerous, very detailed, simulators that show the capabilities and benefits of each approach. Further, the delay you mention, is ac...
@jamespa Classical PI controllers need tuning i.e. commissioning. This is difficult to achieve, unless well-trained. This is why weather curves were e...
@jamespa OK. Let me repeat that I started this post because I think the "weather curve" method is odd, outdated and wrong. Here is my reasoning: 1. ...
@cathoderay I don't think (b) is fixed flow temp. Where did you see this ? If this is the case, it destroys all the benefits of an inverter driven pum...
@jamespa You don't need to predict anything. A PI controller effectively does all these.
@jamespa Every house needs a specific heat power to bring it to a set temperature. This means a specific water temperature. If you lower this temperat...
@cathoderay OK. It is difficult to argue through messaging. I ask you to bear with me. There are 3 ways to control a Midea heat pump, but in the 3rd m...
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Degrees of Separation
Latest Posts
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@trebor12345 20% does sound excessive. Gemini suggests ...
By ChandyKris , 11 minutes ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
If you know the room heat losses for each of the rooms ...
By Temperature_Gradient , 2 hours ago
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RE: Who's your electricity provider and what's your tariff?
Many thanks. Good info
By peterackstraw , 5 hours ago
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@editor — it was a not very well implemented so far as ...
By cathodeRay , 5 hours ago
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RE: Microgeneration Certification Scheme (MCS)
@jamespa A cynical view but, I fear that it is a fair ...
By Toodles , 5 hours ago
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RE: Jokes and fun posts about heat pumps and renewables
... except that the legal notice (part of which was rep...
By JamesPa , 6 hours ago
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RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
@old_scientist if you are going DIY then you may wan...
By Papahuhu , 2 days ago
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RE: Indevolt Batteries UK Support & Info Thread
After a short while that was followed by the 'power war...
By JamesPa , 2 days ago
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RE: Samsung heat pump - data cable issue
That's well done. Cable is the correct type (LIYCY = 2x...
By bobflux , 3 days ago
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RE: Electricity price predictions
I agree, we will find out at the next budget whether th...
By Old_Scientist , 3 days ago
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RE: Missing flow temperature in Heat Geek proposal
@editor I went through HG website, so should be ok for ...
By sttpd1917 , 3 days ago
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RE: Air to air bus grant installer anywhere
The through wall two hole ones have their place (listed...
By EtchedPixels , 3 days ago
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I hope it goes ok, Hon can be hard to set up IF the sof...
By Graham Hendra , 3 days ago
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@clockworks Hi, So there is a big difference between st...
By ASHP-BOBBA , 3 days ago
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@editor wellvery comprehensive answer. I will get all i...
By Keithb , 3 days ago
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