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Industry Resources

Carnot CO2 Transcritical, NH3/CO2 Cascade & Full CO2 Refrigeration Systems – Specializing in R744 Refrigerant

Carnot Refrigeration

Carnot Refrigeration is a Canadian company headquartered in Quebec and established in 2008 with the goal of addressing the HVAC&R industry's failure to provide industrial and commercial clients with a thermodynamic option that would diminish environmental impact. Carnot Refrigeration makes a conscious effort to design refrigeration systems and heat pumps that cut down on the use of polluting refrigerants. It has taken the lead in its field by creating high-efficiency refrigeration systems designed by specialized engineers and manufactured in an environmentally controlled plant or at a constraint-free site. Carnot Refrigeration is experienced in meeting the needs of sports facilities (arenas), supermarkets, distribution centers and the agri-food industry.

CRAC – CO2 Computer Room Air Conditioning Units
Available in 15, 30 & 45 Ton sizes.


Transcritical CO2 system with a capacity of up to 570 Tons – R744 Refrigerant

  • No interruptions of operations during installation
  • Extends and protects the life span of food products
  • CO2 racks use half the space in an existing mechanical room
  • No on-site engineer required
  • Heat recovery for heating air and water
  • Savings on energy of up to 25% and on operating costs of up to 31.5%


Ammonia Cascade and CO2 Systems – R717 and R744 Refrigerant

  • Combination of more efficient refrigerant
  • Very small amount of ammonia
  • Reduction in insurance costs
  • Hot gas defrosting without adding heat
  • Heat recovery for air and domestic water
  • Experience in LEED and Green Building innovation (Case Study "Sobeys Trois-Rivières") ASHRAE Award

Recreation and Sports

Full CO2 Systems – R744 Refrigerant

  • Simple and compact system, plant manufactured
  • No additional expenses for safety
  • No added expenses for additional space in the mechanical room
  • No need for a water tower
  • Ability to maintain existing equipment under the panel
  • Excellent cooling capability, even during summer
  • Reduction of response time of changing needs of ice temperature
  • Heat recovery up to 93 °C (200 °F) for air and domestic water