Public Announcements


Standard 90.4-2019 -- Energy Standard for Data Centers

There's One Data Center for Every 100 People in the United States and Thousands of Facilities Worldwide

Data Center Design for Efficiency, Longevity, and Sustainability

ANSI/ASHRAE Standard 90.4 offers a framework for the energy efficient design of data centers with special consideration to their unique load requirements compared to other buildings.

Standard 90.4:

  • Was developed under the guiding principle that data centers are mission critical facilities demanding careful attention to the potential impact of its requirements
  • Is referenced as an alternative compliance path for large computer rooms, i.e. data centers, in ASHRAE/IES Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings
  • Provides guidance for energy-intensive data centers in the U.S. that consume more than 90B kilowatt-hours of electricity per year
  • Has been in a continuous state of development as a code-intended companion to Standard 90.1 since 2013
  • Requires compliance with Standard 90.1 for building envelope, service water heating, lighting, and other equipment
  • Incentivizes energy efficient designs that harness the increasing availability of improved systems and techniques to enhance data center performance without compromising availability or reliability
  • Provides informational charts, checklists, and example calculations to assist designers in calculating benchmarks values, Mechanical Load Component (MLC) and Electrical Loss Component (ELC), and in evaluating those results for compliance
  • Was featured in ASHRAE's HVAC Industry Newsletter


ANSI/ASHRAE Standard 90.4-2019, Energy Standard for Data Centers

Available Now