Supply ducts are essential components of a heating, ventilation, and air conditioning HVAC system. They are responsible for distributing conditioned air—either heated or cooled—throughout a building. These ducts are typically made of metal, fiberglass, or flexible materials and are designed to ensure that air reaches every room efficiently. Properly designed and installed supply ducts help maintain consistent temperatures and improve indoor air quality. They connect to the air handler or furnace and deliver air through vents or registers. Regular maintenance of supply ducts is important to prevent blockages and ensure optimal airflow.