Conference Certification & Review

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About RETA Certification

RETA certification requires meeting eligibility criteria and demonstrating knowledge of industrial refrigeration concepts, principles and practices. RETA certification exams and other requirements assess competencies in the realm of industrial refrigeration operation. RETA training materials provide the fundamental knowledge needed to understand these concepts and operating principles.

RETA certification exams are accredited by ANSI (American National Standards Institute), which requires that they are continually scrutinized by an organization whose sole mission is to establish, maintain and assure that the highest industry standards are set and met in a continuous and ongoing basis. ANSI is certainly recognized and often highly regarded by regulatory agencies such as EPA and OSHA in the establishment and maintenance of the highest industrial and safety benchmarks.

Certifications Offered at the Conference 

CARO – Certified Assistant Refrigeration Operator 

CARO is an entry-level credential that is designed to demonstrate that an operator has sufficient knowledge to work under supervision in industrial refrigeration. There is no minimum experience requirement for CARO. The exam assesses mastery of concepts and principles in RETA’s Industrial Refrigeration I and the ammonia safety chapter in Industrial Refrigeration IV (chapter 7).


 CARO includes 110 questions and allows three hours for completion.


CIRO – Certified Industrial Refrigeration Operator

CIRO requires documentation of at least two years of experience as a industrial refrigeration operator. It assesses more advanced concepts, principles and applications required to supervise industrial refrigeration operations. CIRO measures mastery of applied refrigeration system operations and troubleshooting based on principles and knowledge addressed in RETA books: Industrial Refrigeration (IR) I · IR II (systems) IR IV (plant operation and safety) Basic Electricity (BE) I · Basic Electricity (BE) II (ladder diagrams).


 The CIRO exam consists of 135 questions and allows three hours for completion.


Registration Options


  • You may join us in Dallas and attend only a certification course
  • You may join us in Dallas and attend both a certification course and the conference


Refrigerating Engineers & Technicians Association
Toll Free: 844.801.3711 · Phone: 541.497.2955 · Fax: 541.497.2966
1725 Ferry St SW, Albany, OR 97322