Why Data Centers Must Prioritize Environmental Sustainability: Four Key Drivers

Overview

The paper no longer treats data centre sustainability as a matter of lowering PUE alone. The scope takes in energy, greenhouse-gas emissions, water, waste, land use and biodiversity. Its starting point is that data centres account for roughly 2% of global electricity consumption. It also gives the efficiency record: the average annual PUE of large data centres, led by hyperscale operators, fell from about 2.0 to about 1.2 over two decades. The authors argue that this gain is no longer enough on its own, because the target area has widened.

The widened agenda is organised into four drivers: customer requirements, government regulation, business value and ESG investment. On the regulatory side, the paper summarises regional rules and voluntary pacts. This comparative frame lets a reader see which driver presses hardest on their own project. The paper does not propose a calculation method; it gives decision makers a rationale and a map of targets.

The regulation section is the most concrete. Under Germany's Energy Efficiency Act, new data centres must reach PUE of 1.2 or lower from July 2026. The required heat-reuse share rises from 10% in 2026 to 20% in 2028. Renewable supply must reach 50% by 2024 and 100% by 2027. Another regional example cited requires PUE below 1.4 from June 2023 and below 1.3 from 2025, with the renewable share climbing from 5% in 2023 to 100% in 2032.

Voluntary frameworks point the same way. The Climate Neutral Data Centre Pact and the EU Code of Conduct for Data Centres, launched in 2008 by the JRC, both use PUE as a key metric. The paper's main conclusion is that regulation is moving from voluntary metrics towards mandatory reporting. Its limit is that thresholds and effective dates change with legal revisions, so it should be read as a 2023 snapshot rather than a standing reference table.

Key points

1. Data centres consume roughly 2% of global electricity.
2. Average annual PUE of large data centres, led by hyperscalers, fell from about 2.0 to about 1.2 over two decades.
3. Four drivers: customer requirements, government regulation, business value and ESG investment.
4. Germany's EnEfG: new data centres PUE <= 1.2 from July 2026.
5. German heat-reuse share rises from 10% (2026) to 20% (2028); renewables 50% by 2024 and 100% by 2027.
6. Another regional example: PUE < 1.4 from June 2023 and < 1.3 from 2025; renewables from 5% (2023) to 100% (2032).
7. The Climate Neutral Data Centre Pact and EU Code of Conduct (2008, JRC) use PUE as the key metric.
8. Regulation is moving from voluntary metrics to mandatory reporting.

Using it in design

• Keep a jurisdiction rules table, for example Germany with PUE_max 1.2 for new builds and heat_reuse_min rising from 10% to 20%.
• Run the modelled annual PUE and ERF through an automatic compliance check against that table.
• Store the effective date of every threshold and flag it for engineer verification as the date approaches.
• Show renewable-share targets as separate year-by-year lines in the design report.

Who should read it

Sustainability leads, operations managers and design engineers planning for regulatory compliance.

Related standards

• EU Energy Efficiency Directive
• German Energy Efficiency Act (EnEfG)
• Climate Neutral Data Centre Pact
• EU Code of Conduct for Data Centres
• ISO/IEC 30134-2

Publication details

Authors

Linda Zhang; Robert Bunger

Publisher

Schneider Electric

Year

2023

Document number

WP 64

Document language

English

Source type

Manufacturer

Access

Free to read

Licence

Copyright retained; citation only — the publisher’s terms apply to the original document

Citation