The answer to 'how long does ductwork last' is that ductwork can last 10-30 years, depending on the materials and installation quality. Well-constructed metal ductwork made of galvanized steel or aluminum can last 15-30 years with proper maintenance. Flexible ductwork typically has a shorter lifespan of 10-15 years. Proper installation, insulation, and regular cleaning and inspection are key to maximizing the lifespan of your ductwork.
Factors that can impact ductwork longevity include the climate, air quality, and any damage or leaks that develop over time. Homeowners should monitor their ductwork for signs of wear, such as cracks, holes, or sagging, and have a professional HVAC technician inspect and repair the system as needed.