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Last seen: Mar 5, 2026
I think you can set the temperature to very low 5C in the time weekly timer. Either do it for the full period when the fire is expected to be on, or y...
Btw, fixing your system so the underfloor heating is working is definitely by far the best you can do to improve your COP substantially. It also provi...
The system doesn’t seem to have return or deltat as a value. For that you’d need something like openenergymonitor. For the cycling I have home assista...
Hi David, as I understand it running the system in active mode means that it is not running in pure weather compensation mode and is hence a little le...
I’ve got a similar system, but it’s a 5kW unit, I understand that is the same hardware as the 3.5. I get a mildly disappointing 3.8 cop. This seems to...
Good old physics tells us that it is impossible to not have to put extra energy in to get the temperature up without putting extra energy in. I havent...
@cathoderay the principle is as probably described somewhere above, that the energy usage is directly proportional to the deltaT between outside and i...
interestingly that’s not what I see, here is the same from my calculations on your data, there is clearly extra energy being put in:
@cathoderay i’m getting different results, using this method: calculate the average kWh/inside outside deltaT Kelvin (sum(kWh in)/sum(deltaT), that ...
As I understand it, it depends where the gauges are relative to the pump and blockage. The gauge in the heat pump is before the pump, so where it is l...
I think that might be an indication of some blockage in the system. I had that difference and lower than the standard vaillant 14 l/min flow rate, unt...
I’m very interested in these for my dad who lives in Germany. They have updated the regs such that you now can attach 200wp of panels, I.e. four panel...
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RE: 7.5kW Heat Loss, But Quoted a 10kW Midea. No Re-Pipe, No Buffer Tank. Does This Add Up?
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@jamespa Someone who is not easily phased I suppose.
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@judith, glad you found the story interesting. On eff...
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