Air-Care requires all trainees to clean all parts of a fully operational HVAC system while learning to use all the tools of the trade. The systems they clean service the training center itself, which incorporates all typical duct configurations. Round, rectangular, and flexible ducts made of steel, duct board and even wood are mounted in the ceiling and floor. Even an operational clothes dryer and exhaust duct must be cleaned in order to pass the class. Graduates of the course are provided with free technical support from Air-Care.