The answer to 'when to replace ductwork' is that you should typically replace your ductwork every 10-15 years, or sooner if it shows signs of significant damage or deterioration. Ductwork is an essential component of your HVAC system, responsible for distributing heated or cooled air throughout your home. Over time, the materials used in ductwork can degrade, leading to air leaks, reduced efficiency, and even potential health hazards.
Some common signs that it's time to replace your ductwork include visible cracks, holes, or excessive rust, as well as unexplained increases in your energy bills or uneven heating/cooling throughout your home. If your ductwork is older than 15 years, it's a good idea to have it inspected by a professional HVAC technician, who can assess its condition and recommend the best course of action.