ASHRAE STD 90.4
Energy Standard for Data Centers
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| Organization: | ASHRAE |
| Publication Date: | 30 October 2020 |
| Status: | active |
| Page Count: | 6 |
scope:
FOREWORD
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.
Document History
September 14, 2023
Energy Standard for Data Centers
A description is not available for this item.
January 31, 2023
Energy Standard for Data Centers
A description is not available for this item.
September 23, 2022
Energy Standard for Data Centers
FOREWORD
Uninterruptable power supplies (UPSs) have become more efficient since the 2016 publication of this standard and their efficiency curves have become flatter over the full load range. SSPC...
January 1, 2022
Energy Standard for Data Centers
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...
August 31, 2021
Energy Standard for Data Centers
FOREWORD
Addendum f modifies Section 5.2.1 to add specific language about building envelope criteria for data centers and how it is to be accounted for in the MLC calculations.
Note: In this...
March 23, 2021
Energy Standard for Data Centers
A description is not available for this item.
October 30, 2020
Energy Standard for Data Centers
FOREWORD
Addendum e adds language to Section 11 intended to clarify how compliance with Standard 90.4 can be achieved through the use of shared systems.
Note: In this addendum, changes to the...
October 30, 2020
Energy Standard for Data Centers
FOREWORD
Addendum b clarifies exactly how credit can be taken for renewables. The renewables credit is limited to 5% of the IT load in order to encourage renewable energy while still requiring...
ASHRAE STD 90.4
October 30, 2020
Energy Standard for Data Centers
FOREWORD
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...
October 30, 2020
Energy Standard for Data Centers
FOREWORD
Addendum a encourages recovery of waste heat from data centers for use in space heating and industrial applications, resulting in net energy savings on a societal level. The addendum also...
January 8, 2020
Energy Standard for Data Centers
A description is not available for this item.
October 16, 2019
Energy Standard for Data Centers
A description is not available for this item.
June 22, 2019
Energy Standard for Data Centers
FOREWORD
The intent of this addendum is to reduce inconsistencies between ASHRAE Standard 90.4, Energy Standard for Data Centers, and ASHRE/IES Standard 90.1, Energy Standard for Buildings Except...
June 22, 2019
Energy Standard for Data Centers
FOREWORD
Addendum g lowers the Mechanical Load Component (MLC) values required for compliance in Section 6. The MLC values published in the 2016 edition of Standard 90.4 exceeded the required limits...
June 22, 2019
Energy Standard for Data Centers
FOREWORD
The first edition of Standard 90.4 was published in July 2016. Accordingly, the Electrical Loss Component (ELC) data were based on the performance of electrical distribution equipment on...
January 1, 2019
Energy Standard for Data Centers
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...
May 31, 2018
Energy Standard for Data Centers
A description is not available for this item.
January 20, 2018
Energy Standard for Data Centers
FOREWORD
Addendum b cleans up redundant wording in Section 4.1.1.2 and creates a more level planning field in Section 4.2.1.2 while eliminating inappropriate text. The addendum clarifies the...
January 20, 2018
Energy Standard for Data Centers
FOREWORD
Addendum a deletes the definition of “alteration” from Section 3 of Standard 90.4 and defaults to the definition used in Standard 90.1 (which is reproduced in Standard 90.4, Annex 1). This...
June 29, 2016
Energy Standard for Data Centers
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;
c. and modifications to systems and...