The answer to 'how long does air duct cleaning cleaning last' is that the effectiveness of air duct cleaning can vary, but it typically lasts between 3-5 years for most homes. This is because over time, dust, debris, and other contaminants can accumulate back in the ductwork, reducing the air quality and efficiency of your HVAC system.
Regular air duct cleaning by a professional service is recommended every 3-5 years to maintain optimal airflow, indoor air quality, and energy efficiency in your home. The exact timeframe can depend on factors like the size of your home, the number of occupants, and how much the ductwork is used.