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Last seen: Aug 19, 2026
@davidnolan22 Couple of questions/ideas Are you operating any kind of noise reduction mode Have you got all rads permanently on, no trvs ...
@gary Thats really interesting. My Vaillant takes (I think) a different approach and whacks the compressor up to 100% modulation immediately after...
Have you got any plots from melcloud showing how it works during recovery from defrost. I have heard an argument that, if you have lots of fancoils,...
I would be careful with that presumption. Minimum volume is at least in significant part about defrost, and what matters is the minimum volume availa...
It sounds rushed to me but also that it may not be possible to question the direction. I hope you are lucky! Since he has been doing it this way fo...
Caleffi speak in one of their tutorials about the benefits of a 3 pipe buffer. Someone else may have taken the trouble to understand it. As always ...
Sorry but fundamentally you have to. The rate at which energy is absorbed by the emitters is determined by the flow temperature and the pipe area ...
OK. I think your theory, if it applies at all, applies to a small minority of use cases. The vast majority of our housing stock doesn't have UFH an...
Yes, its the 'integral' term in a proportional - integral - differential' controller. Vaillant actually call it the 'energy integral', the units are ...
Vaillant have the same concept. Basically its the sum (actual FT - target FT) * Time. So if the actual FT is 30 and the target 35 and this remains t...
Understood. You suggest (I think) that your data shows that oversizing is positively beneficial to performance in your case. Have I understood tha...
Maybe best not to sound too clever, it might upset him. You might be better first to ask why he thinks you might need 2 pumps and then, if necessary,...
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