CO2 Systems
Absolutely Chilled supplies advanced CO2 refrigeration systems by REFRA – built for high efficiency, future compliance, and environmental responsibility. With natural refrigerant R744 (CO2), our solutions are PFAS-free and fully aligned with F-Gas phase-down targets.
Why Choose CO2 Systems?
Efficient. Compliant. Built for the future.
Natural refrigerant CO2 (R744) offers a proven, regulation-ready alternative to HFC-based systems, combining environmental performance with excellent cooling capacity and system flexibility. With a Global Warming Potential (GWP) of just 1, it enables businesses to meet current and future F-Gas and PFAS restrictions without sacrificing performance.
Whether used in transcritical or subcritical systems, CO2 delivers consistent results across medium- and low-temperature applications, from small-format retail sites to large-scale industrial cooling. It supports advanced system design, including cascade configurations, parallel compression, heat recovery, and integration with existing plant infrastructure.
Why Choose CO2 Systems?
Efficient. Compliant. Built for the future.
Natural refrigerant CO2 (R744) offers a proven, regulation-ready alternative to HFC-based systems, combining environmental performance with excellent cooling capacity and system flexibility. With a Global Warming Potential (GWP) of just 1, it enables businesses to meet current and future F-Gas and PFAS restrictions without sacrificing performance.
Whether used in transcritical or subcritical systems, CO2 delivers consistent results across medium- and low-temperature applications, from small-format retail sites to large-scale industrial cooling. It supports advanced system design, including cascade configurations, parallel compression, heat recovery, and integration with existing plant infrastructure.
PFAS-free & ultra-low GWP (1) – fully compliant with F-Gas and upcoming PFAS restrictions
High performance at all scales – reliable cooling from 50 kW to 900 kW+
Warm glycol defrost compatibility – efficient, low-energy defrosting for low temperature systems
Heat recovery ready – reclaim waste heat to boost site efficiency
Safe & non-toxic – classified A1 (non-flammable, non-toxic under ISO 817)
Flexible design options – transcritical, subcritical, cascade, and containerised solutions
✅Future-proof investment – no quotas, no phase-down risk
✅Proven across sectors – trusted in food retail, cold storage, processing, and logistics
✅Adiabatic cooling options – reduce energy use and gas cooler sizing in high ambient conditions
Transcritical CO2 Systems
Transcritical CO2 systems are ideal for commercial refrigeration in high ambient conditions, offering efficient, future-ready performance using natural refrigerant R744 (GWP 1). With no PFAS risk and inherent F-Gas compliance, they’re the preferred choice for supermarkets, logistics hubs and centralised plant rooms seeking long-term reliability and environmental alignment.
CO2 Light
CO2 Light
CO2 Light is a compact, high-efficiency refrigeration unit designed for small-format food retail, forecourts and convenience stores. Delivering up to 53 kW of cooling across medium and low temperature circuits, it’s assembled with proven CO2 technology and up to three compressors on a welded, powder-coated frame. Available in both open-frame (indoor) and enclosed-frame (outdoor) variants, it allows flexible installation with reliable noise insulation and service access. Fully customisable to meet project-specific requirements, CO2 Light uses natural refrigerant R744 for low environmental impact.
Please note, that these products can be fully customised according to your specifications.
CO2 Vertical
CO2 Vertical
CO₂ Vertical systems are designed for compact spaces without compromising on performance. Built vertically to minimise plantroom footprint, this high-capacity unit delivers up to 75 kW of cooling and supports both medium and low temperature applications. With space for up to four compressors, it's ideal for smaller food retail environments where floor space is limited but output demands remain high. Using natural refrigerant R744 (CO₂), this system offers a sustainable, low-GWP solution.
Please note, that these products can be fully customised according to your specifications.
CO2 Ecopack
CO2 Ecopack
CO2 Ecopack is a space-efficient transcritical refrigeration rack designed for medium-sized commercial applications. Built on a low, narrow frame for easy integration and service access, it delivers up to 135 kW of combined cooling using up to four MT and three LT compressors. Its compact form factor makes it an ideal solution for plantrooms with limited space, without compromising on capacity. As part of REFRA’s environmentally focused product line, the Ecopack uses natural refrigerant R744 for low GWP performance.
Please note, that these products can be fully customised according to your specifications.
CO2 Select
CO2 Select
CO2 Select is a versatile transcritical rack system designed for commercial and industrial refrigeration applications. Built on a durable, rigid frame for long-term reliability and ease of maintenance, it offers a wide cooling capacity range from 50 kW to 330 kW. Available with an optional “reach-in” container design for outdoor installation, it provides flexible siting and straightforward access for servicing. Engineered with natural refrigerant R744, CO2 Select offers efficient, low-GWP performance across a range of demanding applications.
Please note, that these products can be fully customised according to your specifications.
CO2 Industrial
CO2 Industrial
CO2 Industrial is a high-capacity transcritical rack system built for demanding industrial refrigeration applications. Offering cooling capacities from 50 kW to 500 kW, it accommodates up to six 6-cylinder reciprocating compressors per stage (MT/LT), making it suitable for large-scale cold storage, food processing, and distribution facilities. This model is available with a “reach-in” containerised option for outdoor installation, providing convenient service access and flexible siting. Designed for performance, durability and ease of maintenance, CO2 Industrial uses natural refrigerant R744 to ensure low environmental impact.
Please note, that these products can be fully customised according to your specifications.
CO2 Container
CO2 Galaxy
CO2 Galaxy
CO2 Galaxy is a high-capacity transcritical CO2 chiller built for industrial applications requiring robust performance and sustainability. Offering up to 800 kW of cooling, it features a modular V-frame design and an integrated gas cooler—simplifying installation and reducing overall project costs.
The unit is built with EC fan motors, finned tube heat exchangers, and reciprocating compressors, and can be configured with options such as built-in hydraulic modules, water storage tanks, and heat recovery. The powder-coated, galvanised steel frame supports lengths up to 13 metres and can be double-insulated with rock wool for ultra-low noise operation. Using natural refrigerant R744 (GWP 1), CO2 Galaxy is fully compliant with F-Gas and PFAS regulations.
Please note, that these products can be fully customised according to your specifications.
Subcritical CO2 Systems
Subcritical CO2 systems are engineered for reliable, high-efficiency performance in lower ambient conditions (–10°C to +15°C), making them ideal for cold storage, blast freezers and industrial process cooling. Operating at lower pressures with natural refrigerant R744, they deliver strong energy savings and regulatory compliance. When used in cascade systems with refrigerants like propylene (R1270), they achieve very low temperatures while maintaining a high COP – even in warmer climates where conventional systems lose efficiency.
CO2 Cascade
CO2 Cascade
CO2 LT Liquid-Cooled systems are designed to integrate with existing chilled water or glycol-based cooling infrastructure, providing efficient low-temperature refrigeration down to –35 °C. Ideal for warehouse environments and industrial applications, this unit uses natural refrigerant R744 to supplement medium-temperature systems with reliable, high-performance deep cooling. By leveraging existing chillers, it offers a cost-effective and space-efficient way to extend cooling capacity.
Please note, that these products can be fully customised according to your specifications.
CO2 LT Liquid Cooled
CO2 LT Liquid Cooled
CO2 Vertical systems are designed for compact spaces without compromising on performance. Built vertically to minimise plantroom footprint, this high-capacity unit delivers up to 75 kW of cooling and supports both medium and low temperature applications. With space for up to four compressors, it's ideal for smaller food retail environments where floor space is limited but output demands remain high. Using natural refrigerant R744 (CO2), this system offers a sustainable, low-GWP solution.
Please note, that these products can be fully customised according to your specifications.
