The answer to 'how long will duct cleaning last' is that the benefits of professional duct cleaning typically last 3-5 years. Proper duct cleaning removes built-up dust, debris, and contaminants that can accumulate over time, improving your HVAC system's efficiency and indoor air quality. However, the longevity of the cleaning depends on factors like the size of your home, how many pets you have, and how frequently you use your HVAC system.
Regular duct cleaning every 3-5 years is recommended to maintain optimal airflow and energy efficiency. Between professional cleanings, you can also do some simple DIY maintenance like replacing air filters and ensuring vents are clear of obstructions.