Singapore-based global data center developer and operator DayOne announced a significant investment in a hyperscale data center campus in Lahti, Finland. The aggregated value of DayOne's investment in Lahti is projected to reach approximately EUR 1.2 billion.
DayOne's global presence spans Asia Pacific and Europe, with active operations in tier-one and emerging data center markets including Singapore, Johor (Malaysia), Batam (Indonesia), Greater Bangkok, Hong Kong, and Tokyo. In Finland, DayOne says it jointly invested with Finnish company Hyperco in the Kouvola data center for TikTok.
The Lahti data center project will transform a former industrial site, located in the neighborhood of Kiveriö, into an advanced, high-performance digital infrastructure facility. Spanning 98,901 square meters, the site is fully zoned for industrial usage. With a total potential capacity of 128 megawatts (MW) IT load, the project comprises a first building of SOMW IT load. Negotiations with potential tenants are in progress, with no agreements finalized to date. Construction will commence with site demolition in Q3 2025, and operations are scheduled to be ready for service in 2027.
DayOne is collaborating with local engineering firms to fully leverage Finland’s naturally cool climate for free cooling and further enhance energy efficiency and sustainability in its operations. The facility will utilize air cool chiller technology and eliminate the need for freshwater cooling. DayOne has also entered into a power connection agreement with Lahti Energy to strengthen local energy grid resilience. Having set up partnerships with both Lahti Energy and the city of Lahti, DayOne has been exploring waste heat reusing and integrating its data center into the local district heating system.
Finland's unique advantages
"Finland is an ideal strategic choice for our European growth," said Jamie Khoo, CEO of DayOne Data Centers. "With its reliable energy infrastructure, renewable energy leadership, highly skilled workforce, and naturally favorable climate that significantly reduces energy consumption and operational costs, Finland offers unique advantages that align perfectly with our commitment to sustainable digital infrastructure. Recognised as European Green Capital 2021, Lahti is advancing towards carbon neutrality, making it a natural fit with DayOne's sustainability goals. We are proud to invest EUR 1.2 billion on Lahti project into the Finnish economy and collaborate closely with Lahti to drive local innovation and sustainability."
The mayor of Lahti, Mr. Niko Kyynäräinen, welcomes the substantial investment. "The data center to be built in Lahti is designed to handle large-scale data processing, enabling the creation of a strong digital ecosystem. In addition to the location, cool climate, clean energy, and stable conditions, Lahti's investment environment once again proved to be a winning operational model," Niko Kyynäräinen said.
Partnerships & collaborations
The Lahti project is expected to support a progressive ramp-up of 100 direct skilled positions and empIoy 1,000 construction workers onsite at its construction peak. DayOne is to enter into a Growth Partnership Agreement with the City of Lahti, Lahti Region Development LADEC, Lahti Energy, and local educational institutions, including a commitment of EUR 2.5 million to LUT Universities as outlined in the agreement. The agreement sets a clear framework for long-term regional cooperation aimed at advancing Lahti's carbon neutrality goals, strengthening the local business and Information and Communications Technology (ICT) education ecosystems, and fostering talent development.
Key areas of collaboration include integrating local companies into the data center's development and operations, innovating waste heat utilization solutions, and aligning educational pathways with industry needs through joint R&D, student internships, and faculty engagement. The partnership also connects DayOne's global academic collaborations, such as with the Sustainable Tropical Data Centre Testbed hosted at the National University of Singapore, to Finnish institutions like LUT Universities to drive innovation in both tropical and cold-climate data center operations.
“The city offers robust government support and a thriving clean-tech ecosystem — providing an ideal environment for advanced, low-carbon digital infrastructure. As we build our presence in Lahti, we are eager to explore meaningful ways to work with the community, especially those who share our vision for digital advancement and environmental responsibility,” said DayOne's Jamie Khoo.
