What is a primary function of a heat exchanger in HVAC systems?

The primary function of a heat exchanger in HVAC systems is to transfer heat between two or more fluids without them coming into direct contact with each other. This process is essential in both heating and cooling applications. For example, in a furnace, the heat exchanger allows the heated air from the burning fuel to warm up the air that is circulated throughout the building. Likewise, in a cooling system, it can help remove heat from the refrigerant and transfer it to the outside air, thereby cooling the indoor air.

Heat exchangers are designed to maximize the surface area for heat transfer and improve the efficiency of the system, making them a crucial component in maintaining comfortable indoor temperatures while conserving energy. This effectiveness in transferring heat is what distinguishes the operation of HVAC systems and contributes to their overall performance.