The answer to 'how long does duct cleaning last' is that the effects of duct cleaning can last anywhere from 3 to 5 years, depending on factors like the size of your home, the number of occupants, and how much dust and debris accumulates in your ductwork. Proper duct cleaning by a professional HVAC technician can significantly improve your indoor air quality and the efficiency of your HVAC system.
However, it's important to note that duct cleaning is not a one-time solution. Regular maintenance and cleaning are recommended to keep your ductwork in good condition and ensure the long-lasting benefits of a duct cleaning service.