Residential Air-to-Air Heat Pumps Practice Test

In heating mode, after the refrigerant exits the compressor, it is in a superheated state and flows into the indoor coil. The indoor coil serves as the heat exchanger where the refrigerant releases its heat to the indoor air. As the superheated refrigerant passes through the indoor coil, it condenses and provides warmth to the living space. This process is essential for the heat pump to effectively transfer heat from the refrigerant into the home, ensuring that the heating system functions efficiently.

The outdoor coil, expansion valve, and condenser are components involved in other stages of the heat pump cycle. The outdoor coil is primarily responsible for absorbing heat from the outside air in heating mode, while the expansion valve controls the flow of refrigerant into the evaporator. The term "condenser" can refer to the function of the indoor coil during this cycle; however, in the context of this specific question, the focus is on the passage of refrigerant after the compressor specifically leading to the indoor coil for heating.