The answer to 'how long does air duct cleaning last' is that the results of a professional air duct cleaning can last between 3 to 5 years, depending on various factors. Air ducts can accumulate dust, debris, and even mold over time, which can reduce the efficiency of your HVAC system and affect indoor air quality. A thorough cleaning by a professional service can remove these contaminants and restore your ducts to optimal condition.
However, the longevity of the cleaning results can vary based on factors such as the size and condition of your ductwork, the number of occupants in your home, and the presence of pets or smokers. Regular maintenance, such as changing air filters and inspecting for any new buildup, can help extend the time between professional cleanings.