What is a compartment or chamber connected to ducts that forms part of the air distribution system called?

The term "plenum" refers to a compartment or chamber in an air distribution system that facilitates the distribution of air throughout a building. It plays a critical role in effectively managing airflow in heating, ventilation, and air conditioning (HVAC) systems.

In a typical HVAC setup, the plenum serves as a central hub where conditioned air from the heating or cooling source can be evenly distributed through the connected ducts to different rooms or areas within a building. This helps in maintaining consistent temperatures and improving air quality, as the plenum allows for the mixing of air coming from various zones, ensuring uniform temperature distribution.

The term itself is crucial in understanding HVAC systems, as it distinguishes the functional components involved in air distribution from other elements like ducts, which are simply conduits for the air, or air handlers, which are responsible for blowing the air into the ducts. Understanding the role of the plenum is essential for anyone involved in propane gas safety and installation, as it emphasizes the importance of proper air distribution in residential and commercial heating systems.