The answer to 'how often to replace duct cleaning' is that most experts recommend having your air ducts professionally cleaned every 3-5 years. Proper duct cleaning helps improve indoor air quality, energy efficiency, and the lifespan of your HVAC system.
Over time, dust, dirt, and other debris can build up in your ductwork, reducing airflow and potentially circulating allergens and pollutants throughout your home. Regular professional duct cleaning removes this buildup and helps maintain the health of your HVAC system.