The answer to 'what does air duct cleaning cleaning include' is a comprehensive service that involves the removal of dust, dirt, and other debris from your home's HVAC system. This typically includes vacuuming and brushing the interior of the air ducts, as well as cleaning the registers, grilles, and other components of the system.
Air duct cleaning can help improve indoor air quality, reduce allergens, and increase the efficiency of your HVAC system. It's generally recommended to have your air ducts cleaned every 3-5 years, or if you notice a significant buildup of dust or debris.