ATMOsphere, the publisher of NaturalRefrigerants, has released Clean Cooling for Datacentres 2025, a new report featuring nine articles based on in-depth interviews with cooling system and component manufacturers.
The report provides an overview of the state of “clean cooling” in the datacentre sector, defined as mechanical cooling with natural refrigerants, liquid cooling systems that use non-fluorinated refrigerants, heat pumps and the components that make it possible to recover and reuse waste heat, and free cooling via dry, hybrid or evaporative coolers. The report also touches on the economic and regulatory forces reshaping the industry’s approach to cooling.
The report can be downloaded for free from the ATMOsphere website.
Clean Cooling for Datacentres 2025 takes a qualitative approach to assessing the current state of clean cooling in datacentres. In-depth articles based on interviews with cooling system and component manufacturers provide the lay of the land and give an idea of what’s next. The following companies were interviewed for the report: Alfa Laval, BAC, Carel, Fenagy, Jaeggi, Kelvion, Secon, SWEP and Zudek.
“This report is not just a first for ATMOsphere but a first for the datacentre sector,” said Michael Hines, the report’s lead author. “This is the first report to focus strictly on clean cooling in datacentres, and it provides valuable insights into the state of natural refrigerants in the industry.”
Below is a short look into each of the nine articles that appear in Clean Cooling for Datacentres 2025, which can be downloaded here.
Alfa Laval - The Swedish manufacturer’s datacentre business is booming with growing demand for both its gasketed and brazed plate heat exchangers. The company is developing new brazed plate heat exchangers to meet the needs of larger coolant distribution units (CDU), according to Anna Blomborg, Head of Datacentres at Alfa Laval. “The forecasts we’re seeing are extraordinary,” Blomborg said.
BAC - Datacentres are big business for BAC, but it’s not just the company’s heat rejection technology that is making a mark on the industry. BAC also offers a single-phase immersion cooling system with an in-tank heat exchanger, which is detailed in a case study on a Houston colocation facility.
Carel - Carel has worked in the datacentre industry since the 1970s. Enrico Boscaro, in addition to being the company’s Group Marketing Manager for HVAC Industrial, is also the Chairman of Eurovent’s IT Cooling Task Force. He participated in a Q&A discussing the evolution of datacentre cooling technologies and regulations in the sector.
Fenagy - Industrial heating and cooling systems manufacturer Fenagy has big plans for the datacentre sector. The company is particularly interested in the potential of waste-heat recovery and is currently working on a project in Kajaani, Finland, where it’s supplying hydrocarbon heat pumps that cool servers, capture waste heat and then lift it for use in the local district heating network.
Jaeggi - Jaeggi has supplied its hybrid dry coolers to more than 200 datacentres since it first broke into the industry in 1996. While much attention has been on the growth of the datacentre industry in the United States, Jaeggi shared why it’s also growing in the Australian market.
Kelvion - Kelvion has worked with datacentres for decades and in the past 10 years its product portfolio has evolved rapidly alongside the industry. Along with his company’s product portfolio of heat rejection solutions, Timo Kivilaht, the SVP of Global Sales and Solutions, discussed Kelvion’s move from the gray space to the white space and how it seeks to help datacentre operators balance capital and operating expenditures.
Secon - Hydrocarbon heat pump and chiller manufacturer Secon has completed more than 30 datacentre projects and is seeing “increased demand in this area,” according to Joachim Schadt, the company’s MD and Owner. One of its recent projects was in Hamburg for European edge datacentre operator Penta Infra, whose Head of Engineering spoke about why propane (R290) chillers were chosen for the Hamburg facility.
SWEP - Global heat exchanger manufacturer SWEP sees an opportunity for its heat exchangers to help datacentres turn waste heat into energy. Christer Frennfelt, Business Development Manager at SWEP, shared details about a high-performance computing datacentre in Sweden where its brazed plate heat exchangers facilitate free cooling and heat recovery.
Zudek - Ammonia (R717) heat pump and chiller manufacturer Zudek has worked on five datacentres across South Africa and Germany. Its recently launched air-cooled chiller, the Windmatik, is being targeted at datacentres, but it was a project featuring its Airmatik chiller that the company spoke about for its case study.
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