When you're designing or upgrading an HVAC (Heating, Ventilation, and Air Conditioning) system, one of the key players behind the scenes is the duct supplier. Simply put, duct suppliers are companies or manufacturers that produce and distribute various types of air ducts used to channel heated or cooled air throughout a building. Whether it's a small residential project or a sprawling commercial complex, having the right ductwork makes all the difference in airflow, energy efficiency, and indoor comfort.