Supply ducts are an essential part of a heating, ventilation, and air conditioning HVAC system. They are responsible for delivering conditioned air from the furnace or air conditioner to different areas of a building. Properly designed supply ducts ensure that air flows efficiently, maintaining comfortable temperatures throughout the space. These ducts are typically made of metal, fiberglass, or flexible materials and can be found in various shapes and sizes. The layout of supply ducts is crucial for effective airflow, as it helps to minimize energy loss and maintain indoor air quality. Regular maintenance of supply ducts can improve system performance and longevity.