The quality of the air you breathe depends greatly on the cleanliness of the ducts that are used to transport it to your room. Air ducts in the walls of your home will build up dust, debris, and other things over time that can be harmful to your health and respiratory system. But with these ducts buried inside of your walls, how can you possibly hope to do anything about that?
The answer is to get professional help. There are many duct cleaning companies that do an excellent job of keeping your ducts clear. They have the equipment to make sure that next to nothing is left behind. The main tool they use is a giant vacuum, with hoses to attach to the vents in your home. While blocking all vents but one, your system will be cleaned out, one duct at a time. They will also remove any debris that might have lodged itself, as well as, apply chemicals to prevent mold and bacterial growth in your ducts.