Last seen: Sep 30, 2025
Indeed. A good rule of thumb is a ASHP with a highish leaving water temperature (say 50 degrees, which means a delta t (difference or delta, between w...
To which I might add, if you aim low enough, sooner or later you will shoot yourself in the foot. That is what sooner or later the industry will find ...
@julianc - thanks. I agree, but perhaps more often than not, there isn't a real engineer directly involved. My system was in effect designed by ...
That's not the same thing, as your comment makes clear: the 35, 40, 55 etc are arbitrary vaguely ordinal numbers (could just as easily be 3 4 and 5 or...
Normally this forum is an excellent example of what a forum (forum: a place where people can exchange opinions and ideas on a particular issue) should...
@julianc - yes, I had all the calculations assumptions etc, room by room and total heat loss at -2 outside/design temps inside, and the problem is tha...
@oswiu - this is something that has come up before (Ecodans having better low temperature performance than Midea units). This is precisely why I sugge...
I agree. I have previously suggested that as it currently operates, MCS is a waste of space. At the very least, they could add realistic ie cold weath...
Very good, I think that will be a hard one to beat!
Using @derek-m's formula and my numbers for the last hour, I get (23.3 x 60 x 5)/1167 = 5.99kWh, giving a COP of 2.995 (3 decimals places not because ...
Yes, the formula is easy, but the measuring is not! Neither the flow rate not the LWT/RWT are constant, they vary continuously. That said, I have noti...
@batalto - I agree, I too have noticed the curiously always whole number kWh numbers (the ambient temp does however have decimals). I suspect both the...
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