Last seen: Aug 15, 2025
I agree with the first part, and have been at pains to point them out, so they can be critically examined, but not the second part. I do not do 'here ...
@jamespa - I have other things to do today, as the sun is out, and so will return to it later. I also need to clear up whatever is goofing my spreadsh...
OK, I suppose the expected energy in is also a modelled value, but the point is that it is a very simple process, using two variables, OAT and observe...
The setback did start on the 4th November, at 2100 hours. As noted earlier, the first and the last days are not typical, they only include 3 rather th...
There are some rather odd things going on! The long post I have just posted (I think) still remains as a draft, despite having clicked ADD REPLY, so I...
When a specific ratio mysteriously reappears something is usually not right! Now i think I might know what it is, and it is the old gremlin of having ...
@derek-m - it's in the post (and is repeated in a reply to @jamespa I am about to post). In short, it is the equation given by the spreadsheet for the...
I agree, but at the moment the results are quite far apart. That is what we have to reconcile. One method is over-correcting, or the other is under-co...
I haven't forgotten there is at least one other way to approach this problem: compare the observed energy use during a setback with the expected energ...
@jamespa - perhaps more importantly, recall that we are using a corrected energy in, the 1.18 correction factor that (on average) brings the calculate...
(a) this is in fact something of an unknown. The external kWh meter reads all energy going in to the heat pump, and as both circulating pumps are supp...
@jamespa is using my data, meaning I can explain how the setbacks are done, and the other factors involved: (1) my system is always on weather compe...
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