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

The primary function of the heat exchanger in HVAC systems is to transfer heat. Heat exchangers facilitate the movement of thermal energy between two or more fluids, which can be air, water, or refrigerant. In an HVAC context, this usually means transferring heat from the air inside a building to a refrigerant in an air conditioning system or vice versa.

This process is crucial for both heating and cooling functions of HVAC systems. In heating modes, a heat exchanger transfers warmth from the HVAC system to the indoor air, effectively raising the temperature within the space. During cooling modes, it removes heat from the indoor air and expels it outside, thereby lowering the indoor temperature.

The ability to efficiently transfer heat is vital for optimizing energy usage and maintaining comfort levels within a building. Other functions mentioned, such as cooling the air, distributing air, or filtering dust, are parts of broader HVAC operations but do not encompass the primary role of the heat exchanger itself.