CO₂ (R744) refrigeration plant
Refrigeration plant using carbon dioxide as refrigerant, in transcritical or cascade configurations, for commercial and industrial cooling.
- Central plant
- Chilled storage
- Frozen storage
- Process cooling
Ammonia (NH₃) central refrigeration plant
- System type
- Central plant
- Temperature duty
- Chilled storage, Frozen storage, Blast freezing / chilling, Process cooling
- Typical applications
- Food & beverage, Meat & poultry, Fish & seafood, Dairy, Logistics / 3PL
Free for buyers. Your request goes to the ColdMatch team, who review it and contact suitable suppliers on your behalf. Suppliers do not receive your details before that review.
ColdMatch facilitates sourcing and RFQs; it does not manufacture, sell, import or export the listed products and is not a regulatory authority. Suppliers are responsible for their products meeting the requirements of the origin and destination countries; buyers for import permissions, local rules and due diligence. Requirements vary by product and country, and the team checks requests before any supplier contact. Regulation and restricted items
Is this the right system for you?
Best fit when
- Large cooling loads serve several rooms, freezers or process users from one plant.
- Qualified ammonia operators and service are available, or can be trained and contracted locally.
Evaluate carefully when
- The site is close to the public or occupied areas — ammonia is toxic, so safety design and permits weigh heavily.
- Local regulation, insurance or service capability for ammonia is unclear.
- Loads are small enough that a packaged system may be simpler to own.
Operating context and compatibility
Confirm machine-room location and ventilation, detection and emergency arrangements, applicable safety codes, charge-reduction options, and local operator competence before comparing offers.
Maintenance, risks and compliance questions
Maintenance to plan for
- Planned servicing by technicians qualified for the refrigerant used.
- Leak detection, safety valve and alarm testing.
Risks to manage
- Refrigerant release — toxic for ammonia, high pressure for CO₂.
- Loss of cooling to every connected room when the plant stops.
Compliance questions to raise
- Safety codes and permits for the chosen refrigerant and machine room.
- Refrigerant restrictions and technician certification rules where you operate.
ColdMatch does not certify equipment or guarantee compliance; requirements depend on your country and project, and your advisers and authorities decide what applies.
Components often specified with it
- Refrigeration controls and plant management
Controllers, valves and supervisory software that run refrigeration plant, defrost and fans and connect them to site management systems.
- Evaporators and unit air coolers
Fan-coil units that remove heat from the cold room or process area, matched to refrigerant, room temperature and air throw.
- Temperature monitoring and alarm system
Sensors, data loggers and software that record temperatures across rooms, vehicles or sites and raise alarms when limits are exceeded.
Sizing and specification questions
Answer these in your request so supplier offers are comparable.
- Cooling loads per temperature level
- Number and type of consumers (rooms, freezers, process)
- Machine-room location and safety approach
- Operator competence and service available locally
- Heat-recovery interest
Unknown items can be left open — the ColdMatch team will ask before approaching suppliers.
Procurement decisions for refrigeration plant
- Total cooling load, temperature levels and how the load varies over the day and year.
- Refrigerant choice (for example ammonia, CO₂ or HFC/HFO) and the competence available to operate it.
- Machine-room space, safety requirements and local regulation for the chosen refrigerant.
- Service coverage, spare parts and operator training in your country.
Estimate it before you request quotes
Free planning calculators that answer the sizing, load or cost questions above. Results are estimates, not quotes; add them to your request so suppliers can check them.
- CO₂ vs ammonia comparison
Gives indicative CAPEX, annual energy cost and 10-year cost of CO₂ and ammonia plant for your duty and climate.
- Compressor sizing calculator
Gives a screening motor power, COP and displacement for a duty at given evaporating and condensing temperatures.
- Refrigeration TCO calculator
Gives 5- and 10-year total cost of competing offers: price, energy, maintenance, downtime and replacement.
How it compares
Ammonia vs CO₂ refrigeration plant
Which natural refrigerant suits your site, loads and local competence?
| Aspect | Ammonia (NH₃) plant | CO₂ (R744) plant |
|---|---|---|
| Refrigerant | Ammonia: toxic and flammable within certain concentrations; long industrial track record. | Carbon dioxide: non-flammable and low toxicity, but operates at high pressure. |
| Usual fit | Large central plants serving cold stores, freezers and process users. | Commercial and industrial systems, including where ammonia is restricted near occupied areas. |
| Site and safety | Machine-room design, detection, ventilation and emergency planning are central. | High-pressure components and relief design; check performance in hot climates. |
| Competence needed | Qualified ammonia operators and service locally. | Technicians trained on CO₂ systems locally. |
| Combined options | NH₃/CO₂ cascade designs keep ammonia in the machine room. | Can be the low-temperature stage of a cascade with ammonia. |
Rule of thumb: Neither is right everywhere. Local rules, climate, load size and the service skills near your site usually decide.
Read the full CO₂ vs ammonia guideStart your request for this system
Optional: answer two questions now and they are pre-filled in the request form, together with “Ammonia (NH₃) central refrigeration plant”.
Continue to the request form
Free for buyers. ColdMatch arranges projects from about USD 250,000; smaller requests are still received and pointed to free planning tools. The ColdMatch team reviews every request before contacting suppliers.
Supplier-confirmed listings
No supplier-confirmed listings are published here yet. ColdMatch only publishes details that a supplier has confirmed in writing and our team has reviewed — we do not show estimated stock, prices or specifications.
You can still request quotes now: send your requirement and the ColdMatch team will review it and contact suitable suppliers on your behalf.
Details shown once a supplier confirms them
- Capacity range (kW or pallet positions)
- Temperature range
- Refrigerant
- Energy data supplied by the manufacturer
- Country of manufacture
- Countries the supplier can deliver to
- Project scale handled
- Availability confirmed by the supplier, with date
- Documents available on request
Buyer resources
Guides for this decision
Buying refrigeration plant by country
Import, delivery and service context for your market.
Need design or a whole facility?
This page is about sourcing equipment. Project planning — sizing a complete facility, layout, scope and contractor structure — is a separate service.
Project planning servicesSources and further reading
Links checked on . They explain rules and practice; they do not confirm that any specific offer complies. Requirements differ by country — check with your own advisers.
- Ammonia Refrigeration — US Occupational Safety and Health Administration
Hazards and safety-management requirements for ammonia refrigeration systems in the United States.
- International Institute of All-Natural Refrigeration — IIAR
Industry body publishing standards and guidance for ammonia and other natural-refrigerant systems.
- Fluorinated greenhouse gases — EU rules (Regulation (EU) 2024/573) — European Commission
EU restrictions on certain fluorinated refrigerants by equipment type and date. Use it to check whether the refrigerant offered is restricted for your equipment in the EU.
- Technology Transitions program (AIM Act) — US Environmental Protection Agency
US limits on higher-GWP HFC refrigerants in new refrigeration and air-conditioning equipment. Parts were under reconsideration in 2026, so check the current status before relying on a date.
Variants: other refrigeration plant system types
Compressor rack / condensing unit
Factory-assembled set of compressors with controls, or a condensing unit, serving one or more evaporators.
- Packaged unit
- Chilled storage
- Frozen storage