In HVAC, the term "duct" primarily refers to what?

In HVAC, the term "duct" primarily refers to an air distribution pathway. Ducts are designed to facilitate the transport of conditioned air from the heating or cooling system to various spaces within a building. They are integral components of the HVAC system, ensuring that air is properly distributed to achieve desired temperature control and improve indoor air quality.

Ducts can be made from different materials, including sheet metal, fiberglass, or flexible plastic, and they come in various shapes and sizes depending on the application and required airflow. Properly sized and installed ducts are essential for the efficiency of the HVAC system, as they help minimize air leakage and maintain consistent airflow throughout the space.

While a ventilation system does involve ducts, the term "duct" specifically denotes the physical channels through which air flows, rather than the system as a whole. Additionally, a thermostat is an unrelated device used for temperature regulation, and insulation materials serve a different purpose in energy efficiency rather than air distribution. Thus, recognizing the defining role of ducts in air distribution is crucial for understanding HVAC systems.