Unlike dryer duct cleaning, which should be checked and cleaned on a regular basis, no independent objective organization advocates HVAC duct cleaning as part of regular HVAC system maintenance. The Environmental Protection Agency states the “EPA does not recommend that air ducts be cleaned except on an as-needed basis because of the continuing uncertainty about the benefits of duct cleaning under most circumstances.” Although duct cleaning isn't always a terrible idea, it isn't required in the majority of circumstances. Cleaning dust in air ducts can be beneficial in certain circumstances, such as when the ducts are unclean or infested with mice or other vermin. If you notice significant visible mold growth in the ducts or on the HVAC system's mechanical components that come into touch with air. That could be a reason to clean. Cleaning usually dusty ducts, on the other hand, adds little significant value. Although frightening "before" and "after"