atNorth FIN02 Helsinki Expansion: 45MW High-Density AI & HPC Campus
Status: Active Construction Phase (5-Story Extension Underway) | Location: Sinimäentie 6, 02630 Espoo, Greater Helsinki Area, Finland
Project Overview
atNorth’s FIN02 data center site in Espoo, Greater Helsinki, represents a landmark 45 MW high-density digital infrastructure expansion specifically designed to support the growing demands of artificial intelligence (AI), simulation, and high-performance computing (HPC) workloads. Operating as a key component of atNorth’s Helsinki data center ecosystem alongside FIN01 and FIN03, FIN02 strengthens the region’s position as a leading sustainable computing hub in Northern Europe. The facility includes a modern five-story, 11,200 m² extension developed in partnership with Skanska, featuring advanced infrastructure optimized for power-intensive workloads, next-generation GPU clusters, and large-scale enterprise computing environments. Engineered for extreme power density, FIN02 incorporates advanced cooling and energy efficiency solutions to support future AI deployments while maintaining operational reliability. The facility is powered by 100% renewable electricity sourced from Finland’s highly stable and predominantly clean energy grid, enabling customers to reduce carbon emissions while scaling their digital operations sustainably. A major sustainability feature of FIN02 is its integration with Fortum’s district heating network, where recovered excess heat from data center operations is reused to provide heating for local homes, improving overall energy efficiency and supporting Finland’s circular energy economy. The site also provides robust connectivity through low-latency cross-connects to FICIX (Finnish Communication and Internet Exchange), enabling efficient regional data exchange, along with direct cloud gateway access for seamless hybrid and multi-cloud deployments. Combining sustainable power, advanced cooling, high-density infrastructure, and strategic connectivity, atNorth’s FIN02 delivers a future-ready platform for organisations requiring secure, scalable, and environmentally responsible infrastructure for AI, cloud, and HPC workloads across Europe.
Quick Facts
| Field | Value |
|---|
| Project Name | atNorth FIN02 Helsinki Expansion: 45MW High-Density AI & HPC Campus |
| Location | Sinimäentie 6, 02630 Espoo, Greater Helsinki Area, Finland |
| Status | Active Construction Phase (5-Story Extension Underway) |
| Commissioning | Phase 1 Go-Live: Q1 2025 / 45 MW Campus Expansion Completion: Autumn 2027 |
| Total IT Load | 35 MW Critical IT Load (45 MW Gross Site Power Capacity across full expansion) |
| Total Capacity | 45 MW Total Campus Substation Capacity across ~23,000+ m² total gross footprint (11,200 m² new expansion phase) |
| Tier Level | Tier III Equivalent / Concurrent Maintainability (ISO 14001, ISO 27001, ISO 50001, BREEAM Certified) |
| Project Type | Purpose-Built Greenfield/Modular High-Density AI, High-Performance Computing (HPC) & Colocation Expansion |
City Profile
| Header | Details |
|---|
| City Name | Espoo |
| Population | 320,000 |
| Urban Agglomeration | ~1.3 million (Helsinki Metropolitan Area) |
| City GDP | ~€20–25 billion (estimated) |
| Per Capita Income | ~€55,000–60,000 |
| City Tier | Tier 1 – Technology & Innovation Hub |
| Key Strengths | Finland's second-largest city; major technology and research center; home to Nokia headquarters and Aalto University; strong startup ecosystem; advanced digital infrastructure; high-quality workforce; strong sustainability initiatives; excellent connectivity to Helsinki; growing data center and cloud infrastructure market; leading hub for telecommunications, AI, and software development. |
Companies Involved
| Header | Details |
|---|
| Developer / Operator | atNorth |
| Strategic Infrastructure Partner | Caruna / Fingrid (Electrical Power Utilities), Fortum (District Heating Partner), Skanska (General EPC Contractor) |
| Construction Contractor | Skanska Finland (Turnkey Design-Build EPC Contractor) |
| MEP Engineering | atNorth Global Engineering & High-Density Thermal Design Teams |
| Network Connectivity | Multi-path underground fiber entry vaults into Helsinki metro rings; carrier-neutral platform with direct peering at FICIX, low-latency subsea routes to Central Europe/Nordics, and direct cloud on-ramps. |
| Power Infrastructure | Dual high-voltage 110kV grid substation connections, static 2N / N+1 block-redundant uninterruptible power supply (UPS) architecture, and standby emergency backup generators. |
Technical Specifications
| Header | Details |
|---|
| Power Capacity | 35 MW Critical IT Power Capacity / 45 MW Gross Substation Feed |
| UPS Redundancy | 2N / N+1 Static UPS Topology |
| Cooling System | High-efficiency natural air-cooling and closed-loop chilled water systems, heat reuse capture infrastructure for district heating export, hot/cold aisle containment, and liquid-to-chip direct cooling capability engineered to support ultra-dense AI nodes (up to 40 kW+ per cabinet). |
| Connectivity | High-efficiency natural air-cooling and closed-loop chilled water systems, heat reuse capture infrastructure for district heating export, hot/cold aisle containment, and liquid-to-chip direct cooling capability engineered to support ultra-dense AI nodes (up to 40 kW+ per cabinet). |
| PUE Target | < 1.18 Annualized Operational Design PUE |
| Energy Mix | 100% matched clean renewable energy (hydro, wind, geothermal) utilizing Finland’s low-carbon energy grid. |
Milestones
| Header | Details |
|---|
| Announcement | February 2023 / Expansion Phase: Mid-2024–May 2026 |
| Construction Start | April 2026 (5-Story Extension) |
| Phase 1 Go-Live | Q1 2025 |
| Full Buildout | Q3/Q4 2027 (Completion of 45 MW Expansion Extension) |
Investment Details
| Header | Details |
|---|
| Total Investment | Estimated €100,000,000 EUR to €150,000,000 EUR |
| Funding | atNorth / Partners Group corporate capital expenditure (CapEx) allocation |