Standard 90.4 is a performance-based design standard developed specifically for data centers with a conditioned floor space power density greater than and IT equipment loads exceeding 10 kW . It serves as a companion to the more general ASHRAE 90.1 , which still governs non-data center elements like building envelopes and lighting. Key Performance Metrics
The data center industry is facing an unprecedented surge in energy demand, driven by high-density AI workloads and global digital expansion. To meet these challenges, has been released as the most current performance-based energy standard for data center design and operation. Unlike general building codes, this standard provides a specialized framework for mission-critical facilities where reliability cannot be sacrificed for efficiency. What is ASHRAE Standard 90.4? ashrae 904 pdf upd
Evaluates the efficiency of cooling systems relative to the IT load. Standard 90
ASHRAE 90.4 PDF Update: Navigating the 2025 Energy Standard for Data Centers To meet these challenges, has been released as
Measures energy losses across the power chain from the utility handoff to the IT equipment. Major Updates in ASHRAE 90.4-2025
Compliance is determined by two primary components calculated based on your specific climate zone: