Air ducts accumulate dirt due to various factors. Airborne particles like dust, pet dander, and debris from construction or renovations settle in ductwork over time. Moisture issues can lead to mold and mildew growth, while pests like insects and rodents may introduce contaminants. Neglecting air filter changes allows more pollutants to circulate. Poor ventilation and indoor smoking can also contribute. Regular maintenance, including filter changes and moisture control, helps prevent dirt buildup. Professional duct cleaning may be necessary if specific issues arise or for improved indoor air quality.
