Data4’s first German mega data centre campus in Hanau marks a pivotal moment for Europe’s digital infrastructure, sustainability ambitions and long-term energy strategy.
With its longstanding experience in sustainable data centre engineering, Deerns is directly advancing these objectives through high-performance electrical engineering design. On this project, Deerns is adopting an integrated approach to designing energy, cooling and infrastructure solutions to create a single, interconnected ecosystem.
This integrated design approach is critical for the Hanau Data Centre Campus which is set to become a strategic hub for data traffic in Europe. Located on a 25-hectare former military site, the campus is planned as a large-scale cloud and AI hub with an IT capacity of up to 180 MW. Its position within the Rhine-Main region strengthens Germany’s role as a critical data traffic and processing node for Europe.
“Germany is one of Europe’s leading countries when it comes to digital infrastructure, making it a strategically important market for us. We want to develop the new campus in Hanau into one of the most powerful, sustainable, and innovative data centre locations in Europe, and thus contribute to the digital future of the continent,” says Christopher Leahy, Sector Director Data Centres at Deerns.
A strategic campus for Germany and Europe
Leahy adds, “From the outset, the project has required a careful balance between speed-to-market, scalability and sustainability. This balance is where Deerns’ multidisciplinary engineering approach plays a defining role, translating ambitious sustainability goals into technically robust, buildable and operable solutions.”
The project sits at the intersection of 3 strategic priorities:
- digital sovereignty
- regional economic development
- Europe’s transition toward decarbonised infrastructure.
Sustainability taking centre stage
In this project, sustainability is embedded into the campus concept with 3 clear goals to:
- Operate entirely on fully decarbonised energy sources
- Recover and reuse waste heat to supply district heating
- Reintegrate recycled demolition materials into the campus’ construction
An integrated approach
Deerns’ integrated engineering approach covers 3 key sustainability drivers:
- Energy integration: aligning grid connection strategies, on-site substations and future-proofed power infrastructure with long-term decarbonisation pathways
- Thermal efficiency: enabling waste heat recovery concepts that are technically compatible with district heating networks
- Material circularity: supporting low-carbon construction strategies through reuse and reintegration of demolition materials
This systems-based mindset ensures that sustainability targets remain achievable not only at commissioning, but throughout the operational life of the campus.
Supporting digital sovereignty through resilient design
Digital sovereignty depends on the resilience and efficiency of the infrastructure that supports it. Deerns’ engineering philosophy prioritises reliability, redundancy and maintainability alongside sustainability.
4 electrical engineering pillars for sustainable data infrastructure:
⚡ Future-proofed power architecture – robust grid connection strategies, on-site substations and scalable distribution systems designed to support phased growth and high-density AI workloads
🌍 Decarbonised energy pathways – enabling operation on fully renewable energy sources while aligning infrastructure with long-term transition scenarios
🔄 System-wide resilience – embedding redundancy, maintainability and operational flexibility into the campus-scale electrical concept
🌡️ Energy ecosystem thinking – ensuring electrical infrastructure is fully aligned with waste heat recovery and district heating integration
Embedding resilience into the campus’ core electrical engineering concept enables Deerns to support secure, future-ready infrastructure for critical European digital workloads.
Engineering Sustainability at Scale
The Hanau campus illustrates how large-scale data centre developments can align economic growth with environmental responsibility. By combining ambitious sustainability goals with rigorous engineering, the project contributes to redefining what “best practice” looks like for European data infrastructure.
