121. In this Subdivision, “coefficient of performance” means the ratio between the energy removed from the air of the room, measured by considering the change in enthalpy between room air entering the electrically operated equipment and room air leaving the equipment, without reheat, to the total electrical energy input to all components of the air-cooling equipment, including compressors, pumps, supply-air fans, return-air-fans, condenser-air fans, cooling tower fans and pumps, and the equipment control circuit.