A higher coefficient of performance means that a refrigerant produces its refrigeration effect more efficiently.

The statement is true because the coefficient of performance (COP) is a measure of the efficiency of a refrigeration system. It is defined as the ratio of the heat removed from the refrigerated space to the work input required to remove that heat. A higher COP indicates that the system is providing more refrigeration effect for each unit of work input, meaning it operates more efficiently.

This efficiency is crucial in HVAC applications, as a higher COP signifies a lower energy consumption for the same level of cooling, which leads to reduced operating costs and less impact on the environment. In practical terms, if you have two refrigeration systems and one has a higher COP than the other, the one with the higher COP will be able to achieve the desired cooling effect using less energy, making it the more efficient choice.