A:AnswerThe Air Doctor unit pulls the Bacteria out of the air that cause Mold and Mildew. It won't stop that which is already set it but it will help prevent it. If you got to AirDoctorpro.com you can read everything this unit is capable of and how it works directly from the MFG themselves not just what the retailer puts out.
A:AnswerHello, this is not a knock off. I own several Air Doctors, 5000, 3000 and a 2000. The 3000 is the only one that Best Buy sells. I am very happy with my 3000.
