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North American Technician Excellence,
Inc. (NATE) is the leading certification program for technicians in the heating, ventilation, air-conditioning, and refrigeration
industry Trane BSI Building Services Institute, Inc. (BSI) is a national education
and training company focusing on high impact sales, marketing, operations, technical, and executive management programs, and
providing products, services, and support for the residential and commercial HVAC contractor. NC Refrigeration Board
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