Air Quality Specialists cleaned the air ducts in my home when I moved in. They are knowledgeable, efficient, and thorough. I couldn't crawl into the vents to check them out, but there seems to be no problem with dust or other debris from the ducts settling anywhere. The company specializes in duct cleaning so they know what they are doing--they aren't a carpet cleaning company that decided to add duct cleaning to earn some extra money. They've been in business at the same location for many years. I highly recommend them.