In Kelvin the percentage difference looks a lot smaller than -20°C to +10°C, more towards a rounding error for an ideal heat pump. So if they can operate at th

In Kelvin the percentage difference looks a lot smaller than -20°C to +10°C, more towards a rounding error for an ideal heat pump. So if they can operate at the same percentage efficiency away from ideal, the extra difference from the actual source/sink temperature could be very minimal right?