ASHRAE maintains these documents through a "continuous maintenance" process, releasing addenda as technologies evolve. Read-Only Versions of ASHRAE Standards
The marks a major shift in the standard's purpose. It has expanded from strictly measuring energy efficiency to including: ashrae 904 pdf upd
There is no ASHRAE 904 . If a PDF claims to be “ASHRAE 904,” it is either a mislabeled 90.4 or a fake document. ashrae 904 pdf upd
The most current version of the data center energy standard is , which updated the 2019 edition. Key Updates and Focus Areas ashrae 904 pdf upd