Power Usage Effectiveness
EDC / EIT
All data-center energy divided by energy used for computing.

Public Policy
Many jurisdictions have policies that address greenhouse-gas emissions and data-center energy and water use. The European Union offers a useful example of the wider direction: measure energy, water and useful heat.
One connected system
Valora brings together three ideas: use less power, put heat to work and reuse water. Changing cooling can change water use, and heat recovery can use power too. Looking at the whole system makes those trade-offs clear.
EU rules offer useful measurements and questions. Each project still follows the laws and permits that apply where it is built.
Current reporting framework
Article 12 of the Energy Efficiency Directive requires annual reporting from data centers with at least 500 kW of installed IT power. Regulation 2024/1364 sets the measurement method and database.
EDC / EIT
All data-center energy divided by energy used for computing.
WIN / EIT
All water entering the data center divided by energy used for computing.
EREUSE / EDC
Useful energy sent outside the data center divided by all data-center energy.
The rules count all incoming water, and count drinking water separately. Reclaimed water can lower drinking-water use, but WUE only improves if total water used for each unit of computing falls.
Heat is counted where warm cooling fluid enters an exchanger and where useful heat leaves the site. Heat sent back to cool the data center is not counted. A planned heat-recovery system does not count as reuse until it delivers heat.
Waste heat
This waste-heat rule uses total rated energy input. That is different from the 500 kW IT reporting threshold.
Current directive
For data centers above 1 MW of total rated energy input, Member States must consider waste heat or another recovery use unless it does not make technical or economic sense.
Installation assessment
New or major refurbished sites above the threshold need a site review. It looks at whether the heat is useful, what it would cost, local and seasonal demand, and available uses.
Local process
Local rules, exemptions, permits and authorization steps decide what a project needs to do. The Directive does not mean every heat-recovery idea must be built.
Commission Recommendation (EU) 2024/2395 gives current guidance on feasibility and cost-benefit analysis. It does not replace the Directive or local law.
Valora policy map
EU policy offers useful measurements and questions. A real result needs a baseline, meters and a clear record of how the site is operating.
Reduce
Valora could look at cooling and support equipment changes that use less facility power while keeping computing reliable.
Count the whole system: pumps, fans, heat pumps, water treatment and controls.
Reuse
Valora could look at moving heat from computer cooling to a real user, including temperature, upgrades, storage, backup, losses and meters.
ERF needs measured heat that replaces another energy source.
Recycle
Valora could look at whether impaired or reclaimed water can reduce drinking-water demand and total make-up water.
Changing the water source alone does not improve WUE. Count water quality, treatment, discharge, permits and all incoming water.
Proof of performance
Moving power, water or heat outside a drawing does not make it disappear from the project.
Measure facility and computing energy, total and drinking-water input, and heat sent to its user.
Record computing load, weather, treatment chemicals, water left over, support power, seasonal demand, storage and backup.
Keep measured results separate from models, business assumptions, rules that still need checking and open questions.
Wider EU setting
EU-level policy direction does not create a facility-specific performance, compliance or emissions result.
Current law and reporting
The European Climate Law sets Union-wide targets. CSRD and ESRS govern company reporting in scope, while the Taxonomy applies its own activity, DNSH, safeguard, verification and disclosure tests. Neither is a facility PUE, WUE or ERF limit.
Current product rule
Ecodesign Regulation 2019/424 governs covered servers and storage products, not whole-facility performance. The EU ETS can apply to qualifying onsite combustion installations; a data centre is not automatically an ETS installation merely because it purchases electricity.
Current energy instruments
Renewable instruments have defined contractual and reporting roles. They do not automatically prove additionality, hourly matching, physical delivery from a named generator or zero project emissions.
Water-use boundary
The EU Water Reuse Regulation sets minimum requirements for reclaimed urban wastewater used in agricultural irrigation. It does not automatically set the quality or permit rules for data-centre cooling; Member State and local rules remain essential.
Status as checked 28 October 2026
Future status needs refresh before publication.
| Status | Measure | Controlled use on this page |
|---|---|---|
| Current directive | Energy Efficiency Directive Articles 12 and 26, implemented through Member States. | Reporting and waste-heat framework with thresholds and feasibility qualification. |
| Current delegated rule | Regulation (EU) 2024/1364. | Reporting method, European database and PUE/WUE/ERF/REF boundaries. |
| Current recommendation | Recommendation (EU) 2024/2395. | Official feasibility and cost-benefit guidance; not an independent facility obligation. |
| Under scrutiny | Commission-adopted common data-centre rating scheme. | Not current law or a minimum performance standard. |
| Future measure | Minimum-performance standards consultation; proposal planned for 2027. | Policy direction only; no final threshold or legal duty from the consultation. |
| Voluntary | EU Code of Conduct. | Voluntary expected-practice context, not legislation or a permit conclusion. |
The proposed rating scheme and draft label classes are not current minimum performance law. This page must be refreshed for the scrutiny outcome, the minimum-performance initiative, revised ESRS effective date and relevant Member State implementation before any public release.
Additional Public Sources
Other governments are also measuring and managing data-center energy, water and grid demand.
Japan
Official information on data centers and energy policy.
Open Japan sourceAustralia
Australia’s data-center rating programme for energy and related performance.
Open Australia sourceUnited States
A DOE fact sheet on data-center energy efficiency.
Open U.S. sourceSouth Korea
Government policy release on AI data centers and connecting them to the grid.
Open South Korea sourceOfficial EU sources
Source status checked 28 October 2026. Links are provided for public context; this page is not legal advice or a compliance determination.