Our Cooling & Heating Systems
We supply a range of high-efficiency CO2 and hydrocarbon systems manufactured by Refra.
Below is an overview of the key technologies we offer – click any category to learn more.
CO2 Systems
High-efficiency, future-ready solutions using natural refrigerants.
Our CO2 systems deliver efficient, ultra-low GWP cooling for commercial and industrial applications using natural refrigerant R744. Designed for transcritical performance, they offer modular capacities from small-scale to multi-megawatt output. Supplied nitrogen-charged and factory-tested, they’re PFAS-free and suitable for both retrofit and new-build systems.
Applications:
- Supermarkets and multi-site retail environments
- Cold storage and distribution hubs
- Breweries, dairies, and food production lines
- Pharmaceutical and biotech cooling
- Mixed-use commercial or industrial developments
- Plant rooms with centralised cooling infrastructure
Key Benefits:
✅PFAS-free, ultra-low GWP (1) solution using natural R744
✅Transcritical and subcritical system options available
✅Cooling capacities from 50 kW up to 1.5 MW+ per unit
✅Modular design for phased installation or system expansion
✅Integration with: gas coolers, adiabatic cooling, and heat recovery
✅Quiet operation and excellent heat transfer performance
Hydrocarbon Chillers
Sustainable cooling with compact, regulation-ready design.
Our Hydrocarbon chillers provide efficient, low-GWP cooling using natural refrigerants R290 (propane), making them ideal for commercial and industrial applications focused on sustainability and compliance. Designed for compact spaces and decentralised systems, they deliver high performance with low charge volumes and full EN378 compliance – offering a future-ready solution that supports low-carbon goals without compromising reliability. Comes with full DSEAR certification.
Applications:
- Decentralised and modular cooling systems
- Process cooling in commercial or industrial environments
- Retrofit projects requiring low-GWP alternatives
- Public sector buildings aiming for low-carbon compliance
- Installations with restricted space or noise limitations
Key Benefits:
✅Utilises natural refrigerants (R290, R1270)
✅Fully F-gas compliant
✅Quiet and efficient operation
✅Cooling capacities available from 20 kW up to 1.5 MW
✅Compliant with EN378 safety standards & comes with DSEAR
Hydrocarbon ASHP
Efficient low-carbon heating for modern building systems.
Our air source heat pumps use R290 (propane) – a natural refrigerant with an ultra-low GWP – to deliver efficient, high-temperature heating for commercial, industrial and public sector buildings. These systems are engineered for performance in UK climates, with robust operation across a wide ambient range and full compliance with EN378 standards.
Applications:
Commercial building decarbonisation (offices, schools, healthcare)
Industrial space and process heating
Public sector heating upgrades
Low-carbon replacements for gas/LPG boilers
Integration with 4th and 5th generation heat networks
Key Benefits:
✅Heating capacities from 20 kW up to 1.5 MW+
✅Delivers flow temperatures up to 70°C
✅SCOP-optimised for year-round performance
✅GWP of just 3 – PFAS-free and future-ready
✅Compliant with current and anticipated F-gas regulations
✅Built-in safety features for commercial applications
✅Ideal for both retrofit and new build
Hydrocarbon WSHP
Smart integration for ultra-efficient, low-carbon systems.
Designed to operate as standalone units or as part of a two-stage system alongside an air source heat pump, our water source heat pumps use natural refrigerant R600a (isobutane) for powerful yet sustainable performance. They’re ideal for ambient loop and fifth-generation network applications, enabling precise temperature control with minimal environmental impact – a future-ready option for commercial and industrial decarbonisation.
Applications:
Low-carbon district energy networks
Commercial & industrial buildings
Public sector buildings with decarbonisation targets
Residential developments with heat networks
Integration with 4th and 5th generation heat networks
- Retrofit-friendly
Key Benefits:
✅Natural refrigerant R600a with ultra-low GWP
✅Supports two-stage system configurations with ASHPs
✅Heating capacities from 30 kW up to 2 MW+
✅Quiet, efficient, and built for long-term performance
✅Compliant with EN378 safety standards & comes with DSEAR
Tanks & Pump Stations
Efficient integration for stable flow and low-carbon operation.
Refra’s buffer tanks and pump stations are engineered to support stable flow, thermal storage, and system efficiency across chilled water, heating, and ambient loop networks. With capacities up to 3000 L and custom-built pump stations based on hydraulic schematics, they provide precise control, seamless integration, and long-term performance in demanding commercial and industrial application
Applications:
- Commercial HVAC and hydronic systems
- Chilled water buffer for heat pumps and chillers
- Thermal storage in low-carbon and hybrid heating systems
- Flow regulation and redundancy in waterloop systems
- Projects requiring customised hydraulic integration
Key Benefits:
Buffer tank volumes from 300 L to 3000 LSuitable for chilled, hot, or recovery applicationsOperating pressure up to 10 bar (model dependent) Anti-legionella kits, e-heaters, & vertical/horizontal options availableIntegrated with Grundfos/Wilo/Lowara pump optionsFactory-assembled, skid-mounted, and pre-tested for fast installations
Air Side Products
Smart integration for ultra-efficient, low-carbon systems.
Refra’s air side products – including air-cooled condensers, CO₂ gas coolers, and dry coolers – are designed to support high-performance, closed-loop cooling and heat rejection in commercial and industrial systems. With capacities up to 1.3 MW and pressure ratings up to 120 bar, the range offers space-efficient, energy-optimised solutions compatible with natural refrigerants and suited for rooftop, plant room, or free cooling applications.
Applications:
- Supermarkets and refrigerated retail
- Data centres and IT cooling
- Process cooling in manufacturing and logistics
- Commercial HVAC and chilled water systems
- Waterloop and free cooling network integration
Key Benefits:
Cooling and heat rejection capacities from 350 kW up to 1.3 MWPressure ratings up to 120 bar for transcritical CO₂ systemsAvailable in vertical, flatbed, and V-shaped configurations EC fan motor technology for low-noise, energy-efficient operationOptimised for rooftop, plant room, and restricted-space installationsNitrogen-charged for safe transport and reliable commissioning