What is the primary purpose of the supply air duct?

The primary purpose of the supply air duct is to provide conditioned air to the area required. This is essential in HVAC (Heating, Ventilation, and Air Conditioning) systems, where the ducts are designed to transport heated or cooled air from a central unit to different rooms or areas of a building.

Conditioned air can refer to air that has been heated, cooled, humidified, or dehumidified according to the needs of the occupants and the design of the space. By efficiently delivering this air, the supply duct plays a crucial role in maintaining indoor comfort and air quality, ensuring that spaces are at a desirable temperature and conducive to activities being conducted within those areas.

While other options may play roles in overall HVAC function, such as air removal or filtering, these are secondary functions or involve different components of the system. The supply air duct's primary and most critical function directly relates to the delivery of conditioned air, highlighting its importance in climate control within built environments.