An official website of the United States government
Here’s how you know
Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Global leaders within the data center industry developed a consistent set of global metrics for measuring energy efficiency and greenhouse gas emissions. This protocol provides the agreed-on measurement protocols for PUE, Green Energy Coefficient (GEC), Energy Reuse Factor (ERF), and Carbon Usage Effectiveness (CUE). This document, dated October 2, 2012, also discusses agreements that have been reached to date.
In response to a 2007 Congressional request, EPA developed this 133-page report to assess current trends in energy use and energy costs of data centers and servers in the U.S., and to outline existing and emerging opportunities for improved energy efficiency. It provides particular information on the costs of data centers and servers to the federal government and opportunities for reducing those costs through improved efficiency.
This document includes the established protocols for measuring Power Usage Effectiveness (PUE) at data centers, based on global industry guidance. The document establishes a standard set of metrics, indices, and measurement protocols which aim to improve data center energy efficiency globally.
Learn and implement global industry standards for data center energy efficiency measurements, metrics, and reporting conventions here. The document also contains contact information for industry leaders participating in the global task force.
Use this brochure to find the most effective ways you can reduce energy use in your data center. IT professionals, facility managers, energy managers, and sustainability coordinators can identify several opportunities to save energy, from virtualizing your servers to organizing your data to managing data center air flow. Print and share this brochure to your colleagues to help your organization reduce its energy consumption.
Use this guide to learn where you can save energy in your data center. The guide uses best practices for program design and implementation to illustrate how to plan strategies, perform measurements, and track program performance.
Use this guide to learn best practices for energy-efficient data center design. The guide covers the Information Technology (IT) systems and their environmental conditions, data center air management, cooling and electrical systems, on-site generation, and heat recovery. This guide was created by the U.S. Department of Energy in March 2011.
Use this document to better understand EPA's 1-100 ENERGY STAR score for data centers and learn how to benchmark your data center in Portfolio Manager. It includes answers to common questions about the score, the Power Usage Effectiveness (PUE) metric, and energy measurement.