Supercomputers return their investment many times over
31.8.2026 – LUMI and Roihu, the two supercomputers located in CSC's Kajaani data center, make Kajaani one of the most significant hubs of high-performance computing in Europe.
The data center in Kajaani is used to model climate change, support medical research and train AI models, among other activities. Rather than being an individual technology investment, it represents national and European research infrastructure whose impacts extend from universities to businesses, and society as a whole.
“It’s important that infrastructure is designed and implemented in an energy-efficient, secure and reliable way,” says Juha Oinonen, a director at CSC.
CSC’s data management solutions and computing environments provide researchers and businesses with resources for cutting-edge research. Oinonen is in charge of CSC’s operations related to the Funet data network and data centers.
High-performance computing is an investment that pays for itself many times over through research, innovation and competitiveness.
Juha Oinonen, a director at CSC
The Roihu supercomputer and the Kajaani data center
LUMI is part of the European joint undertaking on high-performance computing and one of the world’s most powerful supercomputers. To be deployed in spring 2026, the supercomputer Roihu will triple Finland’s national computing capacity. Roihu will be located in CSC’s Kajaani data center.
Granlund played a key role in the design of the LUMI data center, which began operating in Kajaani in 2021. Granlund was responsible for the MEP design and project management of the LUMI data center at the beginning of the 2020s.
LUMI has won several international awards for its environmental sustainability. The waste heat generated by LUMI is utilised in the city of Kajaani’s district heating network.
Over 20 years of cooperation with CSC had created the foundation for a data center upgrade project related to the introduction of the supercomputer Roihu. The data center’s infrastructure is designed to be scalable and to last from one generation of computers to the next.
“The changes required by Roihu were implemented while the facility continued to operate. Combined with the special requirements associated with high-performance computing, this meant that close cooperation was essential at the various stages of the project,” Juha Oinonen says.
CSC as part of scientific breakthroughs
CSC is a company entrusted with a special assignment and owned by the state of Finland and Finnish higher education institutions. Its task is to ensure that researchers and higher education institutions have access to computing and data management environments that enable scientific breakthroughs.
The investments are great, but the impacts are even greater.
“High-performance computing is an investment that pays for itself many times over through research, innovation and competitiveness. It’s important, in many ways, that European data is located in a European infrastructure,” Oinonen says.
Read and download Granlund’s sustainability report
This customer reference was published for the first time as part of Granlund’s sustainability report.
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Jari Innanen
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