Air duct cleaning refers to the cleaning of several heating and cooling system mechanisms of forced air structures. This includes the supply and return air ducts and registers, the heating and cooling coils, the grills, drip pans, and so much more that conduct the flow of air in your home. These components must be appropriately installed, maintained and managed in order for the air system to be free of dust particles, pollen and other contaminates. If moisture is present, there is also a potential for mold. So, what are the benefits of air duct cleaning?