The answer to 'air duct mildew' is that mildew in air ducts is a common problem that can be caused by excess moisture, poor ventilation, or high humidity. Symptoms include a musty odor, visible mold growth, and potential health issues for those with allergies or respiratory conditions. The solution typically involves thorough cleaning and disinfection of the air ducts, as well as addressing the underlying moisture problem.
In many cases, air duct mildew is best addressed by a professional HVAC cleaning service. They have the specialized equipment and expertise to properly clean and sanitize the ductwork, removing all traces of mold and mildew. Trying to clean air ducts yourself can be challenging and may not fully resolve the issue. However, for minor cases, some homeowners may be able to use a shop-vac with a HEPA filter to clean accessible areas of the ductwork.