The ratio of cooling capacity obtained to the electrical input power on the same unit of measurement. The COP value is determined to evaluate the energy efficiency of electrically-driven air conditioners, air-cooled condensing, including compressors, evaporator coils, and condenser coils. The COP value is also determined to evaluate the energy efficiency of packaged water chillers (excluding chilled water pumps, condenser water pumps, and cooling tower fans);