The answer to 'when to clean air duct' is that most experts recommend cleaning air ducts every 3-5 years for most homes. Regular duct cleaning helps improve indoor air quality, reduce allergens, and ensure your HVAC system is running efficiently. However, the frequency can vary depending on factors like the age of your home, presence of pets, and whether anyone in the household has allergies or respiratory issues.
If you notice increased dust, pet hair, or other debris in your home, or if your HVAC system seems to be working harder than usual, those are also signs it may be time for a professional air duct cleaning. Keeping up with regular maintenance can help extend the life of your HVAC system and improve overall home comfort.