Due to the long-term usage the air ducts will get contaminated this is a very big danger for you if breath the contaminated air. The inhaling of the contaminated air will cause sever diseases like lung cancer and lung infection. You should be bothered about the contamination in the ducts for that a frequent inspection is needed. If you are living in a dusty area the you should take much care as the air from outside will contain with a lot of dust and when they pass through the duct the dust will settle at the bending of the duct this will cause damages to the entire duct system. The dust will also settle in the filters in the ducts will also make blockage in the system so a routine inspection is needed for the ducts at-least once in a month. The cleaning of the air duct is very difficult for a non professional cleaner. so if an incident comes for you could surely select a professional technicians. the professional air duct cleaners will be equipped with the top-notch machines and othe