Dirty air ducts can be caused by many things, including dirt, dust, and smoke. Air ducts are often found near the ceiling, so they need to be cleaned regularly to keep them clean and free of debris. What are air ducts? Air ducts route air between the several rooms in your home, circulating air your family breathes in. Air ducts also trap airborne pollutants and extract them manually, typically once a month, for the cleanest air in your home. Since air ducts are usually out of sight, they are the source of the mold and dirt that builds up in the home. When they release dirt into the home, it indicates that you have a severe duct problem. At this point, it is probably wise to have the air ducts cleaned and sanitized by an expert. How do air ducts get dirty? The air ducts inside a home get dirty as dust and dirt from people and things used in the residence accumulate. The air is filtered in and out of the home consistently, so it is not uncommon for dust and debris to gather inside ...