EER: The Energy Efficiency Ratio is calculated by dividing the amount of cooling put out by an air conditioning system IN BTUH, divided by the amount of energy put in to it IN KW. If the air conditioning capacity of a heat pump is 48,000 BTUH, and the compressor, fan and pumps consume 3.43 kW (3,430 watts), the EER is:

48,000 / 3,430 = 14.0

To convert this to COP_c (COP cooling), divide the EER by 3.412. The COP_c is:

14.0 / 3.412 = 4.1