How big cooling capacity of the heat pump.
COPk (Coefficient Of Performance) indicates how efficient the heat pump is by developing the ratio of the effect that the heat pump delivers the power supplied to the compressor.
Energy Efficiency or EER (Energy Efficiency Ratio) specifies how cooling is obtained from the cooling machine per supply of energy unit.
Refers to the electrical power needed to operate the heat pump.
Seasonal energy efficiency
Energy efficiency or SEER (Seasoal Energy Efficiency Ratio) indicates EER fixed over one season with varying temperatures.