What is the purpose of an air plenum in a building?

The purpose of an air plenum in a building is primarily to facilitate the circulation of air. An air plenum serves as a conduit or chamber that allows air to flow from one area to another, typically within heating, ventilation, and air conditioning (HVAC) systems. This airflow is essential for maintaining indoor air quality, temperature control, and overall comfort by distributing conditioned air throughout different spaces in a building.

In HVAC design, the plenum acts as a central point where air is either distributed to various rooms or returns to the HVAC unit for reconditioning. This enables effective circulation and helps in managing the distribution of warm or cool air, which is critical for creating a comfortable living or working environment.

Understanding the role of an air plenum is key for anyone involved in building design or maintenance, especially when considering air quality and energy efficiency.