The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required.
The air conditioning unit consumes 0.48 kWh of electrical energy per hour. It would cost $16.66 to operate this unit for a month (31 days) assuming it runs for 8 hours a day. The coefficient of performance (COP) for this air conditioning unit is 11.
First page of Unitary air conditioner field performance PDF Icon.The paper presents the res ults of performance evaluation of window air conditioners (mainly units or capacity 1.5 TR) which use R22 as the refrigerant and e lectrical power (230 V, 50 Hz) as the actuating energy source.

An air conditioning unit is similar to an air source heat pump with efficiency of around 300% meaning for each 1kw of energy in, it produces 3kw output, therefore it is energy efficient. Up to a Coefficient Performance (COP) of 3.7.

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