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Last seen: Oct 28, 2026
@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 ...
I assume that the vertical axis is kWh/week (ie energy consumed/delivered in any one week), consistent with the title, can you confirm. If so oil pea...
As I said it depends on what you are trying to calculate. If you are trying to calculate heating load (ie what the house needs) then degree-days are ...
Be careful not to confuse kW (power) and kWh (energy). 12.3kW is the (calculated) peak power demand at the design temperature. To get to kWh/year yo...
@cathoderay Thanks The first observation I would make is this: 1100l oil per year is 11.4MWh. Even if your oil is 100% efficient that would sug...
@derek-m Surely that depends on what you are trying to calculate. Degree days will tell you about demand (load) profile whatever the heating technolo...
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