The answer to 'how to maintain air duct cleaning' is to have your air ducts professionally cleaned every 3-5 years. Regular maintenance helps remove built-up dust, debris, and allergens that can circulate through your home's HVAC system. This improves indoor air quality and extends the lifespan of your ductwork.
Between professional cleanings, you can also use a vacuum hose attachment to lightly clean visible duct openings and registers. Avoid using harsh chemicals or solvents, as these can damage the ductwork. If you notice significant dust, mold, or other issues, it's best to call in a professional air duct cleaning service.