CIRO Certification

How do I apply to take CIRO certification exams?

  • All RETA certification candidates must begin by submitting a completed exam certification application to RETA HQ with payment.  Click here for the Certification section of our online store.
  • After review and approval by RETA, your application will be processed and you will receive an email instructing you to call RETA HQ (541-497-2955) to schedule your exam at a RETA testing center.
  • RETA created Study Guides to help candidates prepare to perform well on exams.  Each Study Guide can be downloaded free from the RETA website.  Study Guides include reference information that will be needed to answer questions during each test.  These references will appear on-screen during each test.   Candidates are not allowed to use these study guides during a RETA certification examination.  Candidates should become familiar with these references for the RETA credential they are working toward before taking the test.    
  • The CIRO exam study guide can be downloaded below.
  • Candidates are encouraged to use the exam study guides and other test preparation materials on the RETA website to help them prepare for an exam.

  • The CIRO examination is based on practical experience and RETA’s technical courses as outlined in the Certification Handbook. The test consists of multiple-choice items and is approximately three (3) hours in length. The examination is given in English. You must answer at least 70% of the questions correctly in order to pass the examination.

Certification Fees

2020 Exam Fees: $490.00 RETA member rate; $785.00 non-member rate


RETA membership must be current at the time of application in order to qualify for the member rate. If your company is a corporate member, the certification applicant must be one of the company’s designated members to qualify for the member rate.

CIRO Resources

Item Name Posted By Date Posted
CIRO Application Handbook PDF (814.97 KB) Administration 8/12/2020
CIRO Study Guide PDF (2.64 MB) Administration 9/17/2020

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