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Maximising Efficiency with CO2 Heat Pumps: Achieving a 30°C Return

An infographic showcasing the efficiency of a CO2 heat pump system, predominantly in shades of green to symbolize sustainability. The illustration features a central building equipped with a CO2 heat pump, highlighted by arrows indicating the flow of water and emphasizing a 30°C return. Surrounding icons represent design, installation, maintenance, and product selection processes associated with the heat pump system. Additional imagery includes smaller buildings like an office, a swimming pool, and a school, illustrating the pump's commercial and industrial applications. A small globe icon underscores the global significance of eco-friendly technology. The design is free of text, relying on visual symbols to communicate its message.

In the evolving landscape of sustainable heating solutions, CO2 heat pumps stand out for their efficiency and environmental benefits. These systems are crucial in the shift towards greener energy practices. Clade Engineering Systems, a leader in this field, offers deep insights into optimising these systems, particularly achieving a 30°C return temperature, a key metric in heat pump efficiency.

Understanding 30°C Return in CO2 Heat Pumps

The concept of a 30°C return temperature in CO2 heat pumps is essential. It refers to the temperature of the water returning to the pump after circulating through the heating system. Achieving this optimal return temperature is vital for maximising the efficiency of the heat pump, leading to lower energy consumption and reduced operational costs.

CO2 Pressure-Temperature Phase Diagram illustrating the various states of carbon dioxide across different temperatures and pressures, including solid, liquid, and gas phases, as well as critical and triple points
Figure 1: Phase diagram for CO2 at temperatures from-80 to 80 °C and pressure between 0.1 and 100.0 MPa, modified from Marini (2007). Triple point occurs at approximately-56.6 °C, 0.518 MPa, critical point occurs at approximately 31.1 °C, 7.39 MPa.

Optimising CO2 Heat Pumps for Maximum Efficiency

Optimising CO2 heat pumps involves several strategies:

  • Design Considerations: Customising the design of the heat pump system to the specific needs of a building or application ensures optimal performance.
  • Installation Techniques: Proper installation is critical. It involves selecting the right location and ensuring all components are correctly configured.
  • Regular Maintenance: Routine checks and maintenance prevent potential issues and sustain high efficiency.
  • Product Selection: Choosing the right heat pump is crucial. Explore our Product Selector to find the best fit for your needs.

Case Studies and Applications

Real-world applications of optimised CO2 heat pumps by Clade Engineering Systems demonstrate their effectiveness in commercial and industrial settings:

  • Commercial Buildings: Large office buildings, public facilities like swimming pools, and educational institutions have seen significant reductions in heating costs and enhanced energy efficiency. For more information on such projects, read our case studies on Normanton Pool, Wiveliscombe Swimming Pool, Stanley Library and Ruskin School Project.
  • Industrial Applications: Industrial settings, such as factories, manufacturing plants & warehouses benefit from the robust and efficient heating provided by CO2 heat pumps. We’re currently working on a number of projects and will be posting the results here shortly.

Future of CO2 Heat Pumps and Sustainability

The future of CO2 heat pumps is promising, with ongoing advancements in technology enhancing their efficiency and sustainability. As the world moves towards more eco-friendly energy solutions, CO2 heat pumps stand at the forefront of this transition, offering a viable solution for reducing carbon footprints.


CO2 heat pumps, especially those achieving a 30°C return, represent a significant step forward in sustainable heating technology. Their ability to provide efficient, cost-effective, and environmentally friendly heating solutions makes them an excellent choice for a wide range of commercial applications.

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Discover the Potential of CO2 Heat Pumps

Discover the full potential of CO2 heat pumps for your commercial needs with Clade Engineering Systems. Explore our case studies and Product Selector to find the perfect solution. For personalised advice and solutions, contact our expert team today. Let’s work together to make your heating solutions more efficient and sustainable.


Implications of Permeability Uncertainty During Three-phase CO2 Flow in a Basalt Fracture Network – Scientific Figure on ResearchGate. Available from: Research Gate [accessed 14 Nov, 2023]