NADCA stands for National Air Duct Cleaners Association. A certified NADCA technician has to follow rules and guidelines set by NADCA ensuring that the job is done properly. In order to receive a NADCA certification a technician must take and pass a 150 question exam and score at least 71% or above. Currently two of our technicians are NADCA certified. We always have at least one certified employee at every job site ensuring that everything is done right.