ASHRAE STD 90.4
Energy Standard for Data Centers
|Publication Date:||30 October 2020|
Interpretation IC 90.4-2016-1-OF of was approved on January 8, 2020, in response to a Request for Interpretation of the Standard 90.4 consideration of diesel-rotary UPS systems (DRUPS) and the corresponding accounting of these systems in the electrical loss component (ELC). In crafting the IC, the committee identified several marginal changes to Standard 90.4 definitions and passages in Section 8 that would further clarify the issue.
Addendum d includes those changes and other minor corrections to spelling and text, incorporates the latest ELC values into Section 11, and updates normative references to the standard.
Note: In this addendum, changes to the current standard are indicated in the text by underlining (for additions) and (for deletions) unless the instructions specifically mention some other means of indicating the changes.