Air duct cleaning and replacement are important for maintaining good indoor air quality and efficient HVAC systems. Cleaning removes dust, mold, and other contaminants using high-powered vacuums and brushes, which helps improve airflow and energy efficiency. When ducts are damaged or too deteriorated for effective cleaning, replacement is necessary. This involves installing new ducts to enhance system performance, reduce energy costs, and ensure better indoor comfort. Regular maintenance, including cleaning and replacing ducts when needed, is crucial for the longevity and effectiveness of HVAC systems.