Co2 Chillers | Pure Thermal


CO2 Chillers utilise the natural refrigerant R744 to provide cooling at temperatures as low as -30c.


  • Process Cooling
  • Air Conditioning and Water Cooling
  • Existing Chiller Replacement
  • BREEAM focused applications
  • Combined cooling and high temperature hot water


Due to their utilisation of the natural refrigerant CO2 (R744), CO2 Chillers deliver efficient performance whilst removing the impact of F-Gas regulations and future proofing against F-Gas refrigerant legislation.

CO2 Chillers are also able to deliver high temperature hot water or heating as a bi-product of the cooling process, this means that a site which has a duplicated demand for cooling and hot water or heating, can benefit from extremely high efficiencies and achieve significant carbon savings.

20-600kW to -30c

Commercial/HVAC Applications

New projects must consider the energy use and environmental impact of the development. This is where a natural refrigerant cooling system can provide significant benefits by delivering the required cooling in the most sustainable method.


F-Gas barriers can now be removed by utilising the Pure CO2 Chiller range.

    • Complete temperature range
    • Cooling and Hot Water Outputs
    • Direct chiller replacement
    • Existing Chiller Integration Option
    • District Cooling Compatible
    • Can utilise existing AHU & Fan Coils
    • Air Cooled & Water Cooled
    • 20kW-600kW

Range Overview


Pure Thermal – Enex CO2 Water/Glycol Chiller Specification

Enex are the leading Specialist CO2 Refrigeration Manufacturer with a strong reputation since 2004 for delivering market leading quality with a specialist CO2 engineering approach.

The Enex range includes the Yukon Chiller which provides the specifier with an extremely high performing range of air and water cooled chiller systems that are able to deliver temperatures lower than -25C.

Pure Thermal directly provide the complete range of Enex chillers & reversible chillers within the UK supported by a full range of services from design through to installation & maintenance support.

Range Overview

Production/Manufacturing Applications

CO2 Chillers provide an ideal process cooling solution where reliability and efficiency are required alongside high levels of sustainability.

With output temperature capability down to -30c, CO2 Chillers are able to satisfy the most demanding of production cooling applications. Including Water-glycol cooling and production area cooling. The added benefit in both these applications is that high temperature waste heat can be recycled and utilised on the same site, delivering significant carbon savings through the displacement of fossil fuel heat sources.


High levels of sustainability & carbon savings can now be achieved by utilising the Pure CO2 Chiller range.

    • Temperature range down to -30c
    • Hot water temperature up to 90c
    • Direct Process Chiller Replacement
    • Existing Chiller Integration Option
    • Integrate with existing Fossil Fuel Heat Sources
    • Integration option with existing steam boilers

Chiller + Hot Water

*Efficiency will be dependent on individual project conditions and requirements, an individual illustration can be provided with regard to capital cost, operational costs and return on capital, based on actual site specific information.

Pure Efficency | Pure Sustainability | Pure savings