Keep your indoor air clean and fresh with duct cleaning in Catonsville, MD. At Beltway Air Conditioning & Heating, we clean air ducts quickly in every style of home. Whether you live in a gracious, turn-of-the-century stone manor house or a newer, modern townhome, our duct cleaning services can give you a more pleasant home. The tree-lined streets in Catonsville and the incredible architecture are a feast for the senses, but they come with plenty of pollen and other air-born particles. When running the air conditioning in the summer, you want to make sure your air is as clean as you can get it.