I recently purchased a house built in the early 90's that is in fantastic "like new" shape. After the ducts were cleaned I was amazed at how much dirt and dust was cleaned from our system. The before and after pictures really convinced me that a duct cleaning was a great investment for my new home. Our technician was friendly, curtious, and, most importantly, on time. I would highly recommend Ductworks for any size home of any age.