As with many home appliances (eg refrigerators, washing machines, ovens, etc.), air conditioners are categorized into energy classes to help consumers. Their classification is based on their energy efficiency, ie the beneficial amount of energy they release in space, compared to what they consume. Energy classes ranged from A +++ to G. It is noteworthy that class A +++ is the most efficient, whereas class G is less efficient.
Until recently, the classification of air-conditioning units in energy classes was based on two indicators, the degree of COP and the degree of energy efficiency (EER). The two indices are calculated by dividing the energy delivered (heating or cooling) to the electricity consumed. It is worth noting that high values of each index reflect better levels of efficiency in the heating or cooling mode of the machine.
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