Which component is essential for removing moisture from the air in an air conditioning system?

In an air conditioning system, the main component responsible for removing moisture from the air is the evaporator coil. When warm air from the room passes over the cold surface of the evaporator coil, moisture in the air condenses on the coil, much like how dew forms on grass in the morning. This process helps to lower the humidity within the space being cooled.

While a dehumidifier is specifically designed for the purpose of reducing humidity levels, in the context of traditional air conditioning systems, the evaporator coil directly deals with moisture removal during the cooling process.

The other components, such as the expansion valve and condensing unit, play essential roles in the overall functionality of the air conditioning system but are not primarily intended for moisture removal. The expansion valve regulates the refrigerant flow into the evaporator coil, while the condensing unit dissipates heat and converts refrigerant from gas to liquid.