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The landscape of data center design is shifting rapidly. With the release of and recent addenda to the 2022 version, the industry is moving beyond simple power metrics toward a more holistic view of sustainability.

| Method | Link / Action | |--------|----------------| | | shop.ashrae.org → Search "90.4-2022" (~$99 for non-members) | | Read via Institutional Access | Many university libraries subscribe to ASHRAE Digital Library (free PDF for students/staff). | | Free Preview | ASHRAE provides the first 8-10 pages (scope, definitions, tables) for free on their website. | | Old Draft (2019) | Public review drafts are sometimes archived at ashrae.org/publicreviews (no longer current, but useful for learning). | ashrae 904 pdf upd

After checking official ASHRAE standards, . The most likely correct references are: The landscape of data center design is shifting rapidly

Standard 90.4 provides a performance-based framework tailored to the mission-critical nature of data centers. Unlike its sister standard, ASHRAE 90.1 , which covers general building energy, 90.4 specifically addresses the high-density cooling and power needs of IT environments. | | Free Preview | ASHRAE provides the