The answer to 'air duct cleaning frequency' is that most experts recommend having your air ducts cleaned every 3-5 years, or whenever you notice a buildup of dust, debris, or other contaminants. Regular air duct cleaning helps improve indoor air quality, reduce allergens, and maintain the efficiency of your HVAC system.
The frequency can vary depending on factors like the size of your home, the number of occupants, whether you have pets, and how often the HVAC system is used. Homes with more occupants, pets, or heavy HVAC usage may need more frequent cleanings, such as every 2-3 years. It's also a good idea to have your ducts inspected if you've recently completed renovations or if you notice a change in your indoor air quality.