The number one way to keep your air ducts clean is regularly changing your air filters. Most air-conditioned environments require a filter change every month, and homes with higher traffic levels or pets may need to change their filters every two weeks.
Change air conditioning filters on the first of the month to keep dust, mold spores, various allergens, and contaminants from building up. An added benefit of regular filter changes is that your system’s airflow won’t be restricted. Restricted airflow causes your HVAC system to work overtime, leading to diminished longevity and higher energy bills.