Overview
ISO/IEC 30134-2:2026, published by ISO and IEC, is an international standard focusing on power usage effectiveness (PUE) as a key performance indicator (KPI) for data centres. Recognized across the information technology and data centre industries, this document provides a standardized approach to measure, calculate, and report the efficient use of energy within data centres. PUE helps organizations evaluate and improve the operational and energy efficiency of their facilities by offering a clear framework for assessing infrastructure and IT equipment energy consumption. The standard also clarifies the correct interpretation of PUE and describes various derivatives to address different operational and architectural scenarios.
Key Topics
- Definition of PUE: Establishes PUE as the ratio of total data centre energy consumption to IT equipment energy consumption, measured over a continuous 12-month period.
- Measurement Categories: Introduces three categories of PUE (basic, intermediate, advanced), depending on the granularity and resolution of energy data collected.
- Data Centre Boundary Context: Specifies that PUE is confined to data centre infrastructure and its direct energy inputs, excluding broader resource or productivity metrics.
- Energy Measurement Requirements: Outlines procedures for collecting accurate energy consumption data, including requirements for metering devices and measurement locations.
- Reporting and Interpretation: Details the standards for reporting PUE data to ensure transparency, consistency, and comparability over time-though direct comparison between different data centres is discouraged due to variable influencing factors.
- PUE Derivatives: Provides guidance on extensions such as partial PUE (pPUE), interim PUE (iPUE), mixed-use PUE (mPUE), and designed PUE (dPUE) to accommodate specific site conditions and design targets.
Applications
Implementing ISO/IEC 30134-2:2026 delivers practical benefits for a variety of stakeholders:
- Data Centre Operators: Use PUE as a benchmark to identify opportunities for operational energy efficiency improvements, track trends, and guide efficiency-focused investment.
- Facility Managers and Engineers: Utilize the standard’s measurement methods to assess and optimize the performance of power, cooling, lighting, and supporting infrastructure.
- Data Centre Designers and Builders: Apply designed PUE (dPUE) to set and validate energy efficiency targets in new builds and major upgrades.
- Service Providers: Report PUE and derivatives for colocation, hosting, or cloud infrastructure as part of service-level transparency for tenants and customers.
- Sustainability Officers: Integrate PUE metrics into broader sustainability reporting frameworks, supporting energy management, greenhouse gas reduction, and compliance with energy efficiency initiatives.
- Regulators and Policy Makers: Reference standardized PUE calculations when developing policies or regulations around data centre energy consumption and reporting.
Related Standards
Organizations seeking to implement ISO/IEC 30134-2:2026 should also consider related standards to ensure comprehensive and interoperable energy management:
- ISO/IEC 30134-1: Overview and general requirements for data centre KPIs.
- ISO/IEC 30134-6: Covers the energy reuse factor (ERF), complementing PUE for data centres engaged in waste heat recovery.
- ISO/IEC 22237 Series: Outlines requirements for the design and operation of data centres, providing important context for measurement boundaries.
- IEC 62052 & IEC 62053: Specify general requirements and test conditions for electricity metering equipment.
Conclusion
Adopting ISO/IEC 30134-2:2026 ensures organizations have a robust, internationally recognized method to measure, monitor, and report data centre energy efficiency through PUE. This enables ongoing performance improvement, greater transparency for customers and stakeholders, and alignment with global sustainability objectives in the rapidly expanding digital infrastructure ecosystem.
Open preview (PDF)Information technology — Data centres key performance indicators — Part 2: Power usage effectiveness (PUE)
