Note: ESCO proctors should login for their discounted pricing!
The safe use of refrigerants is one of the most critical responsibilities of today’s HVACR technicians. As our industry transitions away from high-GWP refrigerants toward more sustainable alternatives, hydrocarbon refrigerants, classified as A3 refrigerants, are being reintroduced into a wide range of residential and commercial applications. While these refrigerants offer clear environmental advantages, their high flammability demands specialized training, awareness, and procedures.
This book was developed by the ESCO Institute to serve as both an instructional resource and a field reference for working with A3 hydrocarbon refrigerants such as propane (R-290) and isobutane (R-600a). It combines essential background knowledge with step-by-step safety practices, guided by the latest codes, standards, and regulatory requirements.
Technicians using this manual will gain:
A clear understanding of hydrocarbon refrigerant properties, environmental considerations, and system applications.
Knowledge of the governing codes and standards that define safe installation, servicing, transportation, and storage.
Practical field procedures designed to minimize hazards and ensure compliance with best practices.
Tools such as pressure–temperature charts and sample safety data sheets to support daily service activities.
Whether used in the classroom or on the job, this book and its accompanying certification are intended to protect technicians, customers, and the environment, while supporting a successful transition to next-generation refrigerants.
View a sample of the training manual.
Registered Proctors can review a digital version of the manual by logging in and visiting the resource center.
Instructor Resources (Sold Separately)
PowerPoint presentation: The instructor resource materials include a PowerPoint presentation that correlates directly with the training manual. Each slide within the presentation contains speaker notes that are designed to aid the instructor through the presentation and provide additional talking points.
ESCO proctors should login to purchase the downloadable Instructor Resources. (Once logged in, goto shop and click on “Purchase Digital Media.”)
Free Practice Exams
To further assist in preparing for the exam, we offer free practice exams on our website.
Practice Exams
Certification
To validate HVACR professionals are properly trained in the safe handling, transportation, and storage of A3 refrigerants a 50-question, closed book exam is available.
