Historical
ANSI/ASHRAE 90.4-2019
Energy Standard for Data Centers
Establishes the minimum energy efficiency requirements of data centers for a) design, construction, and a plan for operation and maintenance; and b) use of on-site or off-site renewable energy resources. This standard applies to a) new data centers, or portions thereof, and their systems; b) new additions to data centers, or portions thereof, and their systems; and c) modifications to systems and equipment in existing data centers or portions thereof. Dual units of measurement.
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ashrae]