The answer to 'why is my air duct mildew' is that mold and mildew can grow in air ducts due to moisture buildup, poor ventilation, and inadequate cleaning. Mold thrives in warm, damp environments and can spread quickly through the ductwork, causing potential health issues and degrading air quality in your home.
Common causes of mildew in air ducts include leaks, high humidity, and insufficient maintenance. Over time, dust, debris, and condensation can accumulate, providing the perfect conditions for mold growth. Symptoms may include musty odors, visible mold growth, and respiratory problems for occupants.