How do you know if you need to clean your air ducts?

One of the first signs that you might need your air ducts cleaned is excessive accumulation of dust around the house. Another good indicator that the air ducts are dirty is a dirty supply/return vent ( like the one pictured below). You can also stick a camera inside of a vent and take a picture with flash and u will see how dust the vent it. Also you can always call Kornelia, we do free video inspections 630-359-3840