During air conditioning operation, what happens to the evaporator coil?

Prepare for the ASE Heating and Air Conditioning Test with study materials and multiple choice questions. Each question comes with hints and explanations. Ace your exam with ease!

The evaporator coil plays a critical role in the cooling process of an air conditioning system by absorbing heat from the indoor air. When warm air from the room passes over the evaporator coil, the refrigerant inside the coil evaporates and changes from a liquid to a gas. This phase change absorbs heat from the air, effectively lowering the temperature of the indoor environment. As heat is absorbed, the air that is circulating indoors is cooled and then distributed back into the living space. This process is fundamental to the operation of an air conditioning system, making it comfortable for the occupants by removing unwanted heat from the air inside the building.

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