Learn the Basics About Heat Pumps
Heat pump units contain a refrigeration system consisting of a compressor and two coils of copper tubing, surrounded by aluminum fins that aid in the transfer of heat. These coils closely resemble the radiator in a car. Just as in refrigerators and air conditioners, refrigerant flows through these pipes to and from outdoor coils. When the heat pump is in heating mode, heat gathers in the outside coils and is drawn inside, where the refrigerant evaporates into gas. As it condenses back into a liquid, indoor coils transfer heat into the air. A reversing valve near the compressor changes the direction of refrigerant flow to cool during the summer or defrost outdoor coils in winter.