R-TRADE Online Learning

Strengthen your skills, stay up to date on natural refrigerant technology, and support your long-term career growth through flexible online learning.

Learn from Anywhere

Built to deliver real-world skills technicians can apply in the field, R-TRADE Online Learning is a powerful supplement to the hands-on training experiences you already value: Natural Refrigerant Training Summit, Faculty Training Program, and Technical Training Program.

Through our online learning hub, technicians at all skill levels gain access to expert-led instruction that’s available from your computer, tablet, or phone. When you complete the course, download your Certificate of Completion to show your employer and your clients.

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Why Supplement In-Person Training with Online Learning?

Learn on Your Time

Train when it works for you. On-demand learning fits around service calls, on-call schedules, and busy workloads, making it easier for technicians and employers to prioritize continuous education without downtime.

Reinforce Your Skills

Online learning reinforces hands-on training by giving technicians a place to revisit key concepts, review supplemental materials, and strengthen understanding so knowledge sticks long after in-person sessions end.

Learn from the Best

Instruction is led by industry expert Rusty Walker, combining video-based lessons, knowledge checks, and supplemental resources to create a focused, engaging, and effective learning experience.

Start Your Online Learning Journey

Our CO2 Basics: Transcritical Booster Systems course provides refrigeration technicians with the skillset to install, maintain, and service CO2 (R-744) refrigeration systems.

Learn from the Best in the Business

Rusty Walker is the Training Director at the North American Sustainable Refrigeration Council (NASRC) and a respected leader in commercial and supermarket refrigeration. An industry veteran, Rusty has dedicated his entire career to refrigeration, with experience spanning service technician, lab engineer, corporate trainer, and training manager. He spent more than 15 years in corporate training and leadership roles and brings hands-on expertise from his time at Heatcraft and Hillphoenix.

Throughout his career, Rusty has delivered training to thousands of refrigeration technicians nationwide.

Frequently Asked Questions

How do I register for the course?

Click here to enroll. Then, follow the steps to complete your enrollment.

What topics are covered in this course?

The course consists of eight modules:
  • Module 1: CO2 System Architecture
  • Module 2: Basics of CO2 in Refrigeration
  • Module 3: The Advanced Refrigeration Cycle
  • Module 4: The High-Pressure Control Valve and the Flash Gas Bypass Valve
  • Module 5: Compressor Management Systems
  • Module 6: Air-Cooled Condenser and Adiabatic Gas Cooler
  • Module 7: Cases and Walk-ins
  • Module 8: How-to Videos

How do I complete this course?

To complete this course, you must watch all of the videos in each module and complete all quizzes with a passing grade. After everything is complete, you’ll receive a certificate of completion.

Are classes live at set times, on-demand/self-paced, or a mix of both?

This course is completely self-paced and on-demand. You’re free to watch videos at your own pace and time.

How much time per week should I expect to spend on this course and how long does it run overall?

The course takes an average of 8 and 10 hours to complete. This includes watching videos and taking the quizzes.

What support is available if I have technical issues or questions related to the platform?

For TECHNICAL support, please contact LearnWorlds by email (hello@learnworlds.com), phone (855-899-9555), or by clicking on the “Ask for Help” button on the bottom right of the page.

For questions and issues about the course, contact support@nasrc.org. Someone on the R-TRADE/NASRC team will respond within 48 hours.

How are questions asked and answered in an online course (office hours, messaging, forums)?

Once registered, students can submit questions to the trainer by email.

How will I be graded or assessed (quizzes, assignments, projects, exams)?

We’ll check your knowledge with short quizzes at the end of each module. To continue to the next module, you must pass the previous module with a score of 80% or higher. If you don't pass on the first try, that’s okay. Try again!

Do I get a certificate, CEUs, or other proof of completion, and is it recognized by employers or industry bodies?

Upon passing the course, you’ll receive a certificate of completion to show employers and clients. The North American Sustainable Refrigeration Council, a leading nonprofit in the commercial and industrial refrigeration industry, developed the course.​

Are there deadlines, or can I complete modules entirely at my own pace?

You can complete the modules entirely at your own pace.

What are the benefits of taking this course online compared to traditional training (flexibility, cost, access, etc.)?

We developed this platform to offer technicians the flexibility of on-demand education. The R-TRADE Online Learning platform serves as a supplement to traditional hands-on training.

Do you offer refunds?

We’re sorry, but we don’t offer refunds. However, if you can no longer take the course, we will gladly accept your purchase as a donation. If you’d like a tax donation receipt, please email us at support@nasrc.org.