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CO2 Training

Zero Zone offers a comprehensive in-person program designed to equip technicians with the knowledge and skills required to work with CO2 refrigeration, including installation, maintenance, troubleshooting, and safety considerations. Training for CO2 refrigeration systems is essential as these systems become more favored due to their low global warming potential and natural properties, making it an eco-friendlier choice compared to traditional synthetic refrigerants. However, working with CO2 refrigerants requires specific knowledge and skills, as they operate at higher pressures and have different characteristics than traditional refrigerants like HFCs.

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CO2 Training occurs once a month at our Ramsey, MN facility. 12 seats are available in each class to allow for one-on-one training with each student in the lab. View our current openings to enroll today!
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The training program spans 2 days, with a half-day dedicated to hands-on lab training.


Participants can earn a certification upon successful completion of the training.


The training is conducted by Zero Zone refrigeration professionals who possess extensive experience and expertise.


Over the past two years, more than 150 students have completed this training, from refrigeration contractors to instructors to salespeople.



The training is offered once a month at our Systems Division in Ramsey, MN.


Day 1 runs from 8 am to 5 pm CST, and Day 2 runs from 8 am to about 3:30 pm.


The cost per person is $400, which includes 2 days of training, lunches, dinner on Day 1, refreshments, a training manual, and a certificate.

Safety Gear

Safety shoes are required, but toe covers will be provided if you don’t have your own.

Travel and Lodging

Trainees are responsible for their own travel and lodging arrangements, but there are two hotels in the area that offer corporate rates for participants.


Zero Zone Systems Division

6151 140th Ave NW Ramsey, MN 55303

Training Content:

The training covers various aspects of CO2 refrigeration systems, including:

  • Understanding CO2 properties
  • Knowledge of subcritical and transcritical CO2 systems
  • Familiarization with CO2 components
  • Piping techniques
  • Oil level controls
  • Safety protocols and servicing procedures
  • Start-up procedures

The training concludes with a review and a quiz to assess comprehension and competency, ensuring that participants are well-prepared to apply their knowledge in the field.