Indoor coils during the cooling cycle function as which component?

Indoor coils during the cooling cycle function as which component?

• A. Condenser
• B. Metering device
• C. Compressor
• D. Evaporator

Answer: (D)

The indoor coil is the evaporator. In cooling mode, refrigerant arrives at the indoor coil as a low‑pressure, cold liquid from the metering device. As room air is blown over this coil, heat from the air transfers into the refrigerant, causing the liquid to boil and turn into low‑pressure gas. This heat absorption cools the air, and moisture in the air also condenses on the cold coil, helping dehumidify the space. The cooled, dehumidified air is then circulated back into the room. The refrigerant then moves on to the compressor to be pressurized and sent outside to the condenser to reject heat.

The indoor coil is the evaporator. In cooling mode, refrigerant arrives at the indoor coil as a low‑pressure, cold liquid from the metering device. As room air is blown over this coil, heat from the air transfers into the refrigerant, causing the liquid to boil and turn into low‑pressure gas. This heat absorption cools the air, and moisture in the air also condenses on the cold coil, helping dehumidify the space. The cooled, dehumidified air is then circulated back into the room. The refrigerant then moves on to the compressor to be pressurized and sent outside to the condenser to reject heat.