Last seen: Jul 13, 2025
@johnnyb It sounds like you have got a good handle on this now and the reasons why its not performing well are getting fewer and fewer. Some kind of m...
@mike-h Yes, totally agree about false reassurance Mike. I was thinking that an error would always be in the same direction but I guess that doesnt ha...
@johnnyb No problem, glad it helped. So what flow temperature were you using on the heating last night? UFH is known to have quite a bit of hysteresis...
@mike-h Im not sure I follow you Mike. I can see that external temperature probes may differ from internal, especially if there is a long pipe run. ...
I think the low dT is a consequence of the low flow temp you are trying to use, 1.5-2 is small but although a dT of 5 is often cited as optimum, i don...
@johnnyb Thanks :-). I’m off out on a Xmas do tonight but will sit down and try to answer as many of your questions as I can tomorrow.
@johnnyb This formula does seem a bit contenious, but the results do seem to me to be closer to what is expected (obviously not to everyone though see...
@dunlorn @mike-h So the original post comes from the Heat Pumps UK facebook site, reference to it are shown below. The seem to think that the si...
@johnnyb So I think what might be happening is at the very low flow temperature you are trying to use, you cannot get the UFH to release enough energy...
@dunlorn @mike-h I’ll try and get the original post where this was stated as an excerpt was passed to me. unfortunately I don’t find that the Sa...
Hi @johnnyb I have the same heat pump as you but use radiators not UFH. You should be able to run the UFH on a lower flow temperature than radiator...
@dinhp Ive just come across some info that improves your SCOP. I was dividing your Generation kWh / Usage kWh to get COP, but it appears Samsung hav...
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