Fact: While visible debris or mold growth may indicate the need for air duct cleaning, many contaminants are invisible to... moreFact: While visible debris or mold growth may indicate the need for air duct cleaning, many contaminants are invisible to the naked eye. Over time, dust, allergens, and microbial growth can accumulate within air ducts, compromising indoor air quality and HVAC system efficiency. Regular air duct cleaning can help remove these hidden contaminants and improve overall air quality.