The answer to 'what does duct cleaning do' is that duct cleaning is the process of removing dust, dirt, and other contaminants from the ductwork in a home's HVAC system. Duct cleaning helps improve indoor air quality, increase energy efficiency, and extend the lifespan of your HVAC equipment.
During the duct cleaning process, a professional HVAC technician uses specialized tools and vacuums to dislodge and remove built-up debris from the interior surfaces of the ductwork. This helps reduce the amount of dust, pollen, and other allergens circulating through the home's air. Duct cleaning can also help improve airflow and reduce the strain on your HVAC system, potentially leading to lower energy bills.