Breathe easier! Feel better! Save money! We recommend that you have your air ducts cleaned every two or three years for a healthier home. Your home’s Indoor Air Quality (IAQ) is important. Having a clean, properly functioning heating, ventilating and air conditioning (HVAC) system is vital to maintaining a clean healthy and comfortable living environment. And a newly cleaned air ducts system runs more efficiently than a dirty one, resulting in lower utility bills and a cleaner, less dusty home. Dust, dirt, pollen, animal dander and other airborne contaminants are pulled into your air ducts HVAC system every time the furnace or air conditioner runs.
Source: Clean My Dryer Vent