For all RETA certification programs, certification is valid for three years from test passage date or date of last three-year renewal cycle.

How do I renew my certification? What are certification renewal requirements?

On August 25, 2015 changes were made to the Re-Certification criteria.

The current Re-Certification Criteria can be found on page 15 of the current Certification Application Handbook.

RETA certification holders are notified of renewal requirements within one year of renewal date.

If your Certification is not renewed by the expiration date, you will need to take and pass the Certification exam for the Credential you want to attain. 

Documentation of 24 Professional Development Hours (PDH) or 2.4 Continuing Education Units (CEU) is required to renew certification. (It is the certified individuals responsibility to collect and submit required documentation to RETA HQ.)

Examples include:

  • PDH earned at the annual RETA National Conference.

  • PDH earned by attending monthly Chapter meetings.

  • PDH earned by attending a Safety Day.

  • Most any documented training or schooling that can be shown to relate to industrial refrigeration is acceptable.

HAZWOPER training is not acceptable PDH; i.e. 29CFR1910.120(q) training.

You must submit a Certified Operator Renewal Application form, training documents have a minimum of 24 PDH or 2.4 CEU before your Certification expires. 

There is a fee required at the time of renewal.


You must renew your Certification before the expiration date.

If your Certification expires, you will need to re-test and pass the exam before your again Certified.


Once reviewed and approved at RETA HQ, a new certificate and membership card reflecting updated certification
(and expiration date) is issued.

How do I apply to take RETA certification exams?

  • All RETA certification candidates must begin by submitting a completed exam certification application to RETA HQ with payment.
  • 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 their exam at a RETA testing center.

  • RETA created Study Guides to help candidates prepare to perform well on CARO, CIRO and CRES.  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 CARO, CIRO and CRES exam study guides can be downloaded from the RETA website, under the menu - Certification >> Certification Study Resources

  • Candidates are encouraged to use the exam study guides on the RETA website to help them prepare for an exam.


Item Name Posted By Date Posted
Renewal Application Form PDF (287.24 KB) Administration 12/18/2017
Appendix 500 PDH Table PDF (25.35 KB) Administration 12/27/2016

Refrigerating Engineers & Technicians Association
Toll Free: 844.801.3711 · Phone: 541.497.2955 · Fax: 541.497.2966
1035 2nd Ave SE, Albany, OR 97321