we published a calculator if you would like to dig deeper!
https://airthium.github.io/airthium.com-calculator/
The COP gets lower as the temperature difference increases as you can expect.
The COP gets lower as the temperature difference increases as you can expect.
https://en.wikipedia.org/wiki/Coefficient_of_performance
> The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required.[1][2] Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs.