Mainova WebHouse MWH01 Frankfurt Data Center: 30MW Sustainable Campus
Status: Operational (MWH01.1) / Active Expansion (MWH01.2) | Location: Gwinnerstraße 7 & Mergenthaler Straße 12, 60388 Frankfurt am Main, Germany
Project Overview
Mainova WebHouse MWH01 is a flagship sustainable data center campus located in the Seckbach district of Frankfurt am Main, Germany, delivering up to 30 MW of critical IT capacity for hyperscale, cloud, enterprise, and artificial intelligence (AI) workloads. Developed by Mainova WebHouse, a subsidiary of regional energy provider Mainova AG, the campus spans approximately 12,200 m² across two interconnected multi-story facilities MWH01.1 at Gwinnerstraße 7 and MWH01.2 at Mergenthaler Straße 12 linked by an overhead skywalk to enable efficient operations and campus-wide connectivity. Purpose-built for next-generation digital infrastructure, the campus is engineered to support high-density computing environments with scalable power and cooling systems suitable for AI training clusters, cloud platforms, and mission-critical enterprise applications. Sustainability is central to the design, with the facility operating on 100% certified renewable electricity while incorporating rooftop photovoltaic systems and an advanced waste-heat recovery solution that feeds excess thermal energy into Frankfurt’s local district heating network, reducing the campus’s environmental footprint. Designed to achieve a low Power Usage Effectiveness (PUE) of approximately 1.20, MWH01 combines energy efficiency with high operational resilience. Strategically located within Frankfurt’s primary digital corridor, the campus offers carrier-neutral connectivity and ultra-low-latency access to major telecommunications networks, cloud platforms, and the DE-CIX Internet Exchange, making it an ideal location for organizations requiring secure, scalable, and highly connected digital infrastructure in one of Europe’s leading data center markets.
Quick Facts
| Field | Value |
|---|
| Project Name | Mainova WebHouse MWH01 Frankfurt Data Center: 30MW Sustainable Campus |
| Location | Gwinnerstraße 7 & Mergenthaler Straße 12, 60388 Frankfurt am Main, Germany |
| Status | Operational (MWH01.1) / Active Expansion (MWH01.2) |
| Commissioning | MWH01.1 Phase 1 Live (2024); MWH01.2 Target Go-Live (2025) |
| Total IT Load | 30 MW Critical IT Power Capacity Allocation (Campus Total) |
| Total Capacity | 30 MW IT Load across ~10,500 m² (~113,000 sq ft) of data center whitespace across 2 buildings (MWH01.1 & MWH01.2 connected via skywalk) on a 12,200 m² site |
| Tier Level | Tier III Certified Architecture / LEED Gold Certified Target / ISO 27001, ISO 9001, ISO 14001, ISO 50001 Compliant |
| Project Type | Purpose-Built Hyperscale, High-Density AI Colocation & Enterprise Cloud Hub |
City Profile
| Header | Details |
|---|
| City Name | Frankfurt am Main |
| Population | ~790,000 (City) / 5.6M (Metro Region) |
| Urban Agglomeration | nan |
| City GDP | ~€75 Billion |
| Per Capita Income | €95,000 |
| City Tier | Tier 1 Global Hub; Primary European Connectivity Node |
| Key Strengths | Home to DE-CIX Frankfurt, the world’s leading internet exchange. In 2025, it handles peaks above 200 terabits of connected capacity, providing ultra-low latency (<1 ms) for financial and AI workloads. |
Companies Involved
| Header | Details |
|---|
| Developer / Operator | Mainova WebHouse |
| Strategic Infrastructure Partner | Mainova AG (Parent Utility Network) & City of Frankfurt am Main Municipal Authorities |
| Construction Contractor | Specialized European Mission-Critical General Contractors / Planen-Bauen |
| MEP Engineering | Mainova WebHouse In-House Technical Infrastructure & Global Engineering Teams |
| Network Connectivity | Carrier-neutral platform featuring subterranean path-diverse fiber entrance vaults; redundant Meet-Me-Rooms (MMRs); direct high-capacity dark fiber backhaul linking to DE-CIX Frankfurt, major regional carrier hubs, and global cloud exchanges. |
| Power Infrastructure | Dedicated high-voltage utility grid substations backed by Mainova AG, static distributed N+1 / 2N uninterruptible power supply (UPS) modules, automated switchgear, and multi-megawatt standby emergency diesel generators with on-site fuel autonomy. |
Technical Specifications
| Header | Details |
|---|
| Power Capacity | 30 MW Secured Utility Power Allocation |
| UPS Redundancy | N+1 / 2N Redundant Static UPS Architecture |
| Cooling System | Closed-loop chilled-water cooling infrastructure with water economization, waste-heat reuse integration into municipal district heating, Direct-to-Chip Liquid Cooling (DLC) readiness for high-density AI clusters, and automated BMS environmental controls. |
| Connectivity | Carrier-neutral host offering direct low-latency cloud express on-ramps and cross-connect options across European fiber corridors. |
| PUE Target | < 1.20 Annualized Operational Design PUE |
| Energy Mix | 100% Certified Carbon-Free Renewable Energy backed by Mainova AG green power contracts & on-site solar photovoltaic arrays. |
Milestones
| Header | Details |
|---|
| Announcement | 2021 |
| Construction Start | October 2022 (Official Groundbreaking) |
| Phase 1 Go-Live | Operational (MWH01.1 - 2024) |
| Full Buildout | Operational / Active Expansion Phase (MWH01.2 - 2025) |
Investment Details
| Header | Details |
|---|
| Total Investment | Estimated €200,000,000 EUR to €300,000,000 EUR Campus Capital Expenditure |
| Funding | Corporate Capital Expenditure & Infrastructure Financing by Mainova AG / Mainova WebHouse |