The answer to 'how long does duct cleaning last' is that professional duct cleaning typically lasts 3-5 years before needing to be done again. This is because over time, dust, dirt, and debris can build up in your home's air ducts, reducing airflow and potentially impacting your HVAC system's efficiency. Regular duct cleaning helps maintain good indoor air quality and keeps your heating and cooling system running at its best.
The longevity of duct cleaning depends on factors like the size of your home, how many pets you have, and how much dust and debris accumulates in your ducts. Homes with more occupants, pets, or higher levels of airborne particles may need more frequent duct cleaning, sometimes every 2-3 years. It's a good idea to have your ducts inspected annually and cleaned as needed to keep your HVAC system operating efficiently.