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Last seen: Sep 23, 2026
When I asked the question I was thinking secondary. A 3 bed house may be quite a lot smaller than the designers of a 14kW unit were thinking. I have...
@cathoderay My simple view is this: They have losses, so they increase the flow temp required at the ASHP to achieve a given flow temp at the emitter...
Frist reactions (more considered ones later...) Indeed so. Cycling is said to be ruinous to efficiency but I have never seen the extent to w...
As I indicated in my previous post, I simply don't believe this. I think its an apparent/real SCOP problem not house needs 3 times as much energy to ...
@cathoderay I just had a look back again and spotted this part of one of the plots you posted, where the current in (and to some extent the LWT) is ...
@cathoderay Lots of data here. Firstly I would start by reframing your question from 'why does my house take more energy to heat using ASHP tha...
@cathoderay Lots of data here. Firstly I would start by reframing your question from 'why does my house take more energy to heat using ASHP tha...
Completely agree here. However, reducing it to the basics which I think we know irrespective of assumptions about COP or the accuracy of data from th...
I had understood the figures provided by @cathoderay to be measured electricity consumption (8 ish MWh/year) which he had multiplied by an assumed CO...
According to the databook the minimum output of the Midea unit at LWT55 OAT 7C is 9kW. So its cycling much of the time even if the 12.6kW calculated ...
Its easily done, I had to edit my response to get everything right. Yes if you have 12kW heat loss at -2 then you will need to inject 12kWh into the ...
Its easily done, I had to edit my response to get everything right. Yes if you have 12kW heat loss at -2 then you will need to inject 12kWh into the ...
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Degrees of Separation
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