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Last seen: Oct 27, 2026
I assume a COP of 4 at the starting conditions (but you can adjust the value in the spreadsheet). In the forced recovery model the FT changes so the ...
@derek-m I take account of cop change due to flow temp change. I don't take account of the (generally second order and due to engineering not physics...
So far as I know that's about it. One thing I have found is that sometimes it helps to start by thinking about the emitters, or even the house, rath...
It does work harder, I have never said otherwise, and wouldn't do so because it would violate the laws of physics. I calculate the total energy suppl...
I have now had the time to have a better look at this model which I must say is very neatly laid out, congratulations. I have a couple of questions ...
True, but folding in variable oat before developing the basic theory is making it unnecessarily complex at an early stage and getting an idea based on...
@derek-m, @fazel thank you for your comments. I think I should start another thread on 'on/off' working, it doesn't really fit here.
@derek-m Thanks for this, very nicely set out and logical. I will have a play over the next days but it certainly looks like a great piece of work. ...
Possibly, but this time we can't afford the luxury of waiting for experience etc.
Yet you can install an oil boiler without planning consent but have to jump through loads of hoops to install a heat pump
@derek-m Understood! I've been thinking about the problem of assessing quantitatively the effect of on/off heating (eg when you switch it off ...
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Degrees of Separation
Latest Posts
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RE: The good, the bad and the not that great – my heat pump installation
@editor I completely forgot to document wha...
By Burtis , 2 hours ago
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RE: I need help with Ecodan ASHP
@f1p It turns out there have been a solar panel install...
By Andris , 5 hours ago
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RE: 15kw pump for 225m2 1990's house - over kill?
@seaviews your installer would be right to say that the...
By GrahamF , 5 hours ago
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RE: Vaillant ecoTEC Plus - Flow Temp and Set Up
@trebor12345 That curve looks healthy to me. I woul...
By JamesPa , 6 hours ago
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RE: Tradespeople on Their Phones: What’s Acceptable When They’re Working in Your Home?
Actually, that's a very important point. I've only ev...
By Majordennisbloodnok , 13 hours ago
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@susannasaunders can I just add to @rob-of-york s comm...
By JamesPa , 17 hours ago
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RE: Aerotherm and weather compensation
These are likely inked. The basic explanation is tha...
By JamesPa , 17 hours ago
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RE: Electrical works for air to air heat pump
agree with above. I have not had extra costs added wh...
By Batpred , 18 hours ago
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Good to hear that you found a solution. Absolutely a...
By Batpred , 18 hours ago
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RE: Are there any comparisons of DHW heat stores around?
@sarahemmm I have done things the opposite way round I ...
By Toodles , 1 day ago
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RE: How will removing the standing charge on gas bills benefit heat pumps?
The BUS grant funding for 2026/27 will run out at the c...
By Rob of York , 3 days ago
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RE: Say hello and introduce yourself
@e-a-west as the good Major said, welcome to the forums...
By Mars , 4 days ago
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RE: How much of your renewable and home setup would still work if the internet went down?
Yes I actually have a copy of a tool that whenever a ce...
By EtchedPixels , 5 days ago
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RE: Indevolt Batteries UK Support & Info Thread
@editor Hi, To resolve this, please tap on the A...
By Indevolt Tech , 5 days ago
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