
QUICK ANSWER
ATMOsphere reported in May 2026 that North American transcritical CO2 installations reached 6,360 supermarket and industrial sites in 2025, a 28 percent year over year increase representing 1,390 new systems. Industrial transcritical CO2 grew 42 percent year over year to roughly 1,240 facilities, a 2.5 times increase since 2023. Roughly 1,480 low charge ammonia systems are also in service across North America.
Every one of those conversions decommissions an existing plant. Because conversions are planned capital projects rather than failures, the equipment coming out is generally running when it is pulled, which is why plant conversion packages are among the better sources of used industrial refrigeration equipment available.
The conversion numbers
ATMOsphere published its natural refrigerant market data in May 2026. The North American picture: [1]
- 6,360 supermarket and industrial sites using R744 in 2025, up 28 percent year over year, representing 1,390 new systems added between 2024 and 2025.
- 5,120 supermarkets and grocery stores on transcritical CO2, roughly 6 percent of the approximately 85,110 stores across the US and Canada.
- Approximately 1,240 industrial facilities on transcritical CO2, up 42 percent year over year and 2.5 times the 2023 figure.
- Roughly 1,480 low charge ammonia systems and about 5.1 million self contained hydrocarbon cabinets in service.
The industrial growth rate is the number worth sitting with. Forty two percent year over year in industrial transcritical CO2 means the conversions are no longer concentrated in retail food. They are happening in the plants that run the equipment this market trades in.
Why conversion equipment is different from distressed equipment
There is a meaningful distinction between the two main sources of used industrial refrigeration equipment, and it changes what you should expect on the receiving dock.
Distressed equipment comes out of a plant that stopped. A bankruptcy, a line shutdown, a facility that ran to failure. The equipment may be fine, but it was often sitting before it was pulled, maintenance may have tapered in the final period, and documentation is frequently incomplete because the people who kept it are gone.
Conversion equipment comes out of a plant that is still operating. A cold storage operator moving to CO2 or low charge ammonia is executing a capital project, usually with a funded budget, an engineering firm involved, and a commissioning schedule for the replacement. The outgoing machines are typically running the week they are disconnected, and the maintenance records exist because the plant needed them right up to cutover.
That is a quality argument you can verify. Ask which of the two situations the package came from, and ask for the maintenance history and the run hours. On a conversion package, both should be available.
What carries over and what does not
When a plant converts, not everything that comes out is worth the same to the next buyer. The dividing line is generally how refrigerant specific the component is.
Usually transfers well
- Motors and starters. Electrically agnostic, long service life, and frequently the item with the worst new equipment lead time relative to cost.
- Control panels and switchgear, subject to the caveat below on controls integration.
- Condensers and cooling towers. Evaporative condensers in particular hold value well when the coil and basin are sound.
- Vessels, liquid receivers, and separators, where pressure rating and code stamping suit the new duty.
- Pumps, valve groups, and general auxiliary equipment.
- Ammonia compressor packages in general. An ammonia screw or reciprocating machine coming out of a plant converting to low charge ammonia or CO2 is often a straightforward fit for another ammonia operation.
Requires closer evaluation
- Refrigerant specific components. Anything sized, rated, or materially selected for the original refrigerant needs verification against the new duty rather than assumption.
- Evaporators. Circuiting, tube material, and defrost arrangement are application specific. Evaporators often transfer, but check the design conditions against yours.
- Safety systems, relief devices, and detection. Set points and sizing follow the original design. Treat these as items to be re-engineered rather than reused as configured.
- Controls software and integration. The panel may be excellent hardware and still require substantial work to talk to your system.
Our used compressor buyer checklist covers the mechanical inspection in detail, and it applies to conversion equipment the same as anything else.
Timing the market
Plant conversion packages do not sit. They come available on the conversion project schedule, which means a window of a few weeks between the decision to sell and the rigging date, and they move to whoever is ready.
If you have a known capacity need coming, the practical move is to tell a dealer what you are looking for before the package exists rather than after. Specifications, tonnage range, refrigerant, voltage, and footprint constraints. That way the match happens when the plant calls. This is how most cold storage expansion projects get equipped on schedule.
This is also the supply side reason the reclaim rules matter to buyers. Conversions are exactly the situation those rules were written for, and a conversion package handled by a seller who documented the refrigerant recovery properly is a cleaner asset than one that was not.
What this means if you are the one converting
If your plant is moving to transcritical CO2 or low charge ammonia, the outgoing equipment is an asset on a clock. Its value is highest while it is still running and documented, and it declines from the moment it comes out and sits.
Get a valuation before the rigging contractor is scheduled, not after the equipment is in a yard. That sequencing alone is usually worth more than any negotiation on the price. Submit your equipment or see how we buy used refrigeration equipment. On the buy side, browse current inventory or call 201-805-1441 with your specifications. Conversion packages move quickly, and the buyers who get them are the ones already on the list.
Frequently Asked Questions
About the Author
Michael Rosenberg works with buyers and sellers of surplus and used industrial refrigeration equipment at Refrigeration Equipment Professionals, which has supplied ammonia and freon systems directly to contractors and plants for more than 25 years. His day to day work covers plant decommissioning packages, compressor and chiller sourcing for food processing, cold storage, brewing, and industrial refrigeration operations, and equipment valuations for owners liquidating or upgrading a refrigeration plant. Reach him at 201-805-1441 or through the contact page.
Sources
- ATMOsphere, Refrigeration: Commercial and Industrial Refrigeration with Natural Refrigerants (May 2026), reported by NaturalRefrigerants.com. https://naturalrefrigerants.com/news/adoption-transcritical-co2-north-america-increased-28-in-2025/
- IIAR Condenser, The Design of CO2 Refrigeration Systems Using Ammonia System Design Principles. https://iiarcondenser.org/the-design-of-co2-refrigeration-system-using-ammonia-system-design-principles/
- U.S. EPA, Emissions Reduction and Reclamation Program fact sheet on reclaim requirements (January 2026). https://www.epa.gov/system/files/documents/2026-01/er-r-fact-sheet-reclaim-2026-01-13.pdf
Refrigeration Equipment Professionals (REP) is a trusted supplier of industrial refrigeration systems and surplus/used equipment, offering compressors, chillers, condensers, evaporators, ice machines, freezers, coolers, pumps, motors, complete plants, and services like purchasing, refurbishing, shipping, export crating, and storage/consignment support. With 25+ years of experience and clients across North America, Latin America, the Middle East, and Asia, we deliver reliable, cost-effective refrigeration solutions worldwide.








