Welcome to the D4 Project
This website, created as part of the E4S program run by EPFL, IMD and the University of Lausanne, documents the complete operation of Infomaniak's D4 data center.
Sustainability
Redefining data centre efficiency for a greener digital future.
Innovation
Harnessing cutting-edge technology to power tomorrow's world.
Efficiency
Optimizing performance to minimize energy consumption.
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What's D4 in short ?
Built by Infomaniak in Geneva, D4 is a fully underground data centre that recovers 100% of the heat its servers produce and redirects it to warm up to 6,000 homes through the city's district heating network. No traditional cooling. No wasted energy.
Powered entirely by renewable electricity, D4 proves that a data centre doesn't have to be an environmental liability. It can be a net contributor to the communities it operates in.
The full project, including architecture, technology and lessons learned, is documented open source on this website so any organisation or policymaker can replicate it.
Who's behind the construction ?
Infomaniak is a Swiss-based cloud provider founded in 1994. Long before sustainability became an industry talking point, it was already running its data centres without air conditioning, using filtered outdoor air since 2013. D4 is not a one-off experiment. It is the result of over a decade of engineering choices made with environmental impact in mind.
Visit the inside of the D4
Featured videos
Visitez un data center innovant en Suisse : souveraineté, chaleur réutilisée et sécurité des données
L’idée de génie de ce DATACENTER 💡
ON PERCE les SECRETS du DATACENTER DU FUTUR
REAL-TIME EFFICIENCY STATS
See how we're optimizing performance and sustainability, live!
Current PUE
Power Usage Effectiveness (PUE) measures how efficiently the data center uses energy. A lower PUE indicates better efficiency.
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Current ERF
Energy Reuse Factor (ERF) evaluates how much energy is reused effectively. Higher values indicate improved energy recovery.
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Total Heat Energy
Discover the total heat energy transported to SIG since November 12th 2024.
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Meet the team behind D4's documentation
This website was created by a group of students from the interdisciplinary E4S program. Enterprise for Society (E4S) aims to drive the transition toward a resilient and inclusive economy that respects planetary boundaries while addressing the challenges and opportunities of scientific and technological advancements.
Antoine Trabia
Technical expert
Maxime Sperandio
Technical expert
Guillaume Chapalain
Financial expert
Mariam Nassar
Web Master
Explore everything you need to know about our data centre – from its innovative design
and impact on policymakers to technical insights for replication.
Context
Curious about data centres, Infomaniak, and why D4 matters? This page offers a straightforward overview, providing the key background needed to navigate and understand the content.
Policy Makers
A comprehensive guide designed for non-technical stakeholders, offering insights into how the data centre operates and its financial aspects.
Technical Guide
An in-depth guide for engineers and tech professionals, providing all the details needed to replicate our data centre.