The answer to 'how often to clean air duct cleaning' is that most experts recommend having your air ducts cleaned every 3-5 years. This helps maintain indoor air quality, improve HVAC efficiency, and extend the lifespan of your system. Regular cleaning removes dust, pollen, and other contaminants that can accumulate in the ductwork over time.
However, the exact frequency may vary depending on factors like the size of your home, the number of occupants, whether you have pets, and whether anyone in your household has respiratory issues or allergies. Homes with more occupants or pets, or those with family members who suffer from allergies or asthma, may need more frequent duct cleaning, such as every 2-3 years.