What is the primary function of a plenum in HVAC systems?

The primary function of a plenum in HVAC systems is to create airflow distribution. A plenum is a enclosed space or chamber that receives air from the HVAC system, typically from the air handler or furnace, and distributes it evenly to various ducts leading to different areas of a building. This ensures that the conditioned air, whether heated or cooled, is delivered effectively throughout the space, maintaining a consistent temperature and air quality.

In addition to its role in airflow distribution, the design and size of the plenum impact the overall efficiency of the HVAC system. By allowing for smooth and balanced air movement, it can help prevent hot or cold spots in a building and reduce the need for excessive energy consumption to achieve desired indoor climate conditions.