Which term describes a compartment connected to ducts in an air distribution system?

The term that describes a compartment connected to ducts in an air distribution system is "plenum." In the context of HVAC (Heating, Ventilation, and Air Conditioning) systems, a plenum is typically a space or box that is used to distribute air from the ductwork to various areas within a building. It serves as an important part of the air handling system, allowing for the efficient transfer of conditioned air to different parts of the structure.

Plenums can be located above ceilings, below floors, or in other designated areas, and they connect directly to the ducts that deliver air. This design helps in maintaining air pressure and optimizing airflow. The use of plenums allows for more effective temperature regulation and improves the overall efficiency of the HVAC system, as they serve as the central hub for air distribution.

Understanding the function of a plenum within an air distribution system is crucial for fire officers and safety personnel, as it also plays a significant role in smoke management and the spread of smoke during a fire incident. In contrast, terms like room, ductwork, and chamber refer to different aspects or components of building infrastructure and do not specifically denote the compartment used in the air distribution context.