RSES has released the third edition of its Hydrocarbon Refrigerants study guide and eLearning course. The study guide and eLearning course are designed to assist HVACR professionals in understanding the requirements to safely maintain and service systems that utilize flammable refrigerants currently approved under the Environmental Protection Agency’s Significant New Alternatives Policy (SNAP) Program.

The 106-page study guide and eLearning course cover practices for the following refrigerant families:

● HC R-290 (propane).

● HC R-600a (isobutene).

● HC R-441A (a blend).

● HC R-170 (ethane).

● HFC R-32 (difluoromethane).

The eLearning course is broken down into four parts: Standards and Regulations, Refrigerant Properties and Safety System Component Compatibility, Servicing Procedures, and the Refrigeration Cycle and Cylinder Storage and Transport.

The third edition includes an expanded appendix to include the EPA regulations; EPA charge size tables, temperature-pressure charts for HCs, R-32, and some HFOs, refrigerant properties for R-32 and all HFOs, and more.

In addition to the study guide, the third edition of Hydrocarbon Refrigerants is also available through RSES as an eLearning course and test, or a test-only option. The online training course includes the third edition of the Hydrocarbon Refrigerants study guide PDF, a four-part review and test. A certificate of completion is awarded to individuals who successfully pass the exam.

To order the third edition of the Hydrocarbon Refrigerants study guide, contact RSES by calling (800) 297-5660 or visit

Publication date: 10/30/2017

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