What is the purpose of a duct in construction?

The purpose of a duct in construction is to convey air. Ducts are integral components of heating, ventilation, and air conditioning (HVAC) systems, designed specifically to transport conditioned air from the HVAC equipment to different spaces within a building, and to return stale air back to the system for reconditioning. The proper design and installation of ducts ensure efficient airflow and maintaining indoor air quality, which is crucial for comfort and health.

While some might consider other functions like conducting water, supporting structural integrity, or isolating sound, these relate to different systems and components. Ducts are not intended for plumbing purposes (conducting water), do not have a structural role (supporting structural integrity), and are not designed primarily for soundproofing (isolating sound). Each of these functions belongs to other building systems or components, emphasizing the specific role of ducts in air conveyance within mechanical systems.