After calling many duct cleaning services only to be told they do not work in condos, my husband asked the property manager if he knew anyone he could recommend. He suggested Certified Clean Air Services. They cleaned the construction debris which had sat in the ductwork for 3 years and cleaned the ducts from the heat exchange unit. The serviceman was extremely nice and answered all my questions even those not related to the actual job but to another concern I had about the air quality in the unit. He was efficient and knowledgeable and did a great job. Excellent job at a great price.