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ASHRAE Standard 90.4-2022 -- Energy Standard for Data Centers (ANSI Approved), 2022
- Online Supporting Files
- Return to Previous Page
- ANSI/ASHRAE Standard 90.4-2022 [Go to Page]
- Contents
- 1. Purpose
- 2. Scope [Go to Page]
- 2.1 This standard applies to
- 2.2 The provisions of this standard do not apply to
- 2.3 Where specifically noted in this standard, certain other buildings or elements of buildings shall be exempt.
- 2.4 This standard shall not be used to circumvent any safety, health, or environmental requirements.
- 3. Definitions [Go to Page]
- 3.1 General. Certain terms, abbreviations, and acronyms are defined in this section for the purposes of this standard. When the tense or plurality of the term differs from the defined term, the defined term still applies. These definitions are applic...
- 3.2 Definitions
- 4. Administration and Enforcement [Go to Page]
- 4.1 General
- 4.2 Compliance
- 5. Building Envelope [Go to Page]
- 5.1 General
- 5.2 Compliance Paths
- 6. Heating, Ventilating, and Air Conditioning [Go to Page]
- 6.1 General
- 6.2 Compliance Paths
- 6.3 Simplified/Small Building Option (Not Used)
- 6.4 Mandatory Provisions
- 6.5 Maximum Annualized Mechanical Load Component (Annualized MLC). Annualized MLC shall be calculated using Equation 6.5. The resulting value shall be less than or equal to the value in Table 6.5.
- 6.6 Submittals
- 6.7 Minimum Efficiency Tables (Not Used)
- 7. Service Water Heating [Go to Page]
- 7.1 General
- 7.2 Compliance Paths
- 8. Power [Go to Page]
- 8.1 General
- 8.2 Compliance Paths
- 8.3 Simplified/Small Building Option (Not Used)
- 8.4 Mandatory Provisions
- 8.5 Maximum Design Electrical Loss Component (Design ELC) for Designs Involving Electrical Systems Only. Design ELC shall be calculated in accordance with Section 8.4 and shall be less than or equal to the values shown in Table 8.5 or Table 8.6.
- 8.6 Maximum Design Electrical Loss Component (Design ELC) for Designs Involving Both Electrical and Mechanical Systems. Design ELC shall be calculated in accordance with Section 8.4 and shall be combined with the annualized MLC in accordance with Sec...
- 8.7 Submittals
- 8.8 Product Information (Not Used)
- 9. Lighting [Go to Page]
- 9.1 General
- 9.2 Compliance Paths
- 10. Other Equipment [Go to Page]
- 10.1 General
- 10.2 Compliance Paths
- 11. Alternative Compliance Method [Go to Page]
- 11.1 General
- 11.2 Compliance. Compliance with Section 11 shall be demonstrated by complying with all of the following conditions:
- 11.3 Use of Shared Systems. Where existing or proposed mechanical and/or electrical systems are intended to routinely support the data center and other spaces (i.e., spaces that do or do not meet the definition of a data center), the data center or d...
- 12. Normative References
- Informative Appendix A: Informative References
- Informative Appendix B: Sample Submittal Forms
- Informative Appendix C: Tools For Illustrating Compliance [Go to Page]
- C1. Examples: UPS Segment of design ELC Calculations
- C2. Examples: Distribution Segment of Design ELC Calculations
- C3. Sample Spreadsheet Format Calculation of Total ELC
- Informative Appendix D: Additional Guidance on Telephone Exchanges
- Informative Appendix E: Addenda Description Information
- Annex 1: Reference Standard Reproduction Annex—ASHRAE/IES Standard 90.1-2022 [Go to Page]
