Great Oaks Institute of Technology's (Cincinnati) hvacr department and RETS Tech Center's (Centerville, OH) hvacr department have received national accreditation through the Partnership for Heating, Ventilation, Air-Conditioning and Refrigeration Accreditation (PAHRA) program. Accreditation from PAHRA certifies that the hvacr programs at these colleges have exceeded industry standards in its instruction, curriculum, student, faculty, and facility standards set forth by industry in areas of residential hvac, light commercial hvac, and commercial refrigeration.

Partnerships in PAHRA include the Air-Conditioning and Refrigeration Institute (ARI), the Air Conditioning Contractors of America (ACCA), the Gas Appliance Manufacturing Association (GAMA), the North American Heating, Refrigeration & Air Conditioning Wholesalers Association (NHRAW), the Plumbing Heating Cooling Contractors Association (PHCC) and the Council of Air-Conditioning and Refrigeration Educators (CARE).