The answer to 'why is my air duct moldy' is that mold growth in air ducts is often caused by excess moisture and poor ventilation. Symptoms include musty odors, visible mold growth, and increased allergy or respiratory symptoms. Solutions may include improving airflow, fixing leaks, and cleaning or replacing contaminated ductwork.
Mold can thrive in warm, damp environments like air ducts. Common causes include leaks, high humidity, poor ventilation, and condensation buildup. Left untreated, mold can spread quickly and compromise indoor air quality. It's important to address the root cause to prevent recurring issues.