Air ducts don’t need to be cleaned too frequently like air filters and other components of your HVAC. But they still need regular maintenance after every 3-5 years to offer expected airflow and air quality.
A general rule of thumb by the National Air Duct Cleaners Association (NADCA) is that air ductwork should be cleaned after 3-5 years.
Although some innovative methods can increase the cleaning cycle to 6-8 years, we recommend cleaning air ducts every 3-4 years. However, this is not a DIY, we recommend professional duct sanitization for the best results.