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About This Item

 

Full Description

Standard 90.1 has been a benchmark for commercial building energy codes in the United States, and a key basis for codes and standards around the world, for almost half a century. This standard provides the minimum requirements for energy-efficient design of most sites and buildings, except low-rise residential buildings. It offers, in detail, the minimum energy efficiency requirements for design and construction of new sites and buildings and their systems, new portions of buildings and their systems, and new systems and equipment in existing buildings, as well as criteria for determining compliance with these requirements. It is an indispensable reference for engineers and other professionals involved in design of buildings, sites, and building systems.

The 2022 edition of Standard 90.1 incorporates over 80 addenda to the 2019 edition. Major additions appearing for the first time in a minimum-efficiency U.S. model energy standard or code at the national level include:

  • A minimum prescriptive requirement for on-site renewable energy
  • An optional Mechanical System Performance Path allowing HVAC system efficiency tradeoffs based on the new total system performance ratio (TSPR) metric
  • New requirements to address the impacts of thermal bridging

Other highlights include:

  • An expanded scope to include sites as well as buildings
  • New energy credit requirements for a customized approach to improving energy efficiency
  • New informative guidance for using carbon emissions, site energy, or source energy as alternative performance metrics to the current energy cost metric
  • Significant efficiency increases in IEER for commercial rooftops and a new SEER2/HSPF2 metric for <65K sized air-cooled heat pumps
 

Document History

  1. ASHRAE 90.1-2022 (SI)

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    Standard 90.1-2022 (SI Edition) -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

    • Most Recent
  2. ASHRAE 90.1-2019 (SI)


    Standard 90.1-2019 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

    • Historical Version
  3. ASHRAE 90.1-2016 (SI)


    Standard 90.1-2016 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

    • Historical Version
  4. ASHRAE 90.1-2013 (SI)


    Standard 90.1-2013 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

    • Historical Version
  5. ASHRAE 90.1-2010 (SI)


    Standard 90.1-2010 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI/ASHRAE/IES)

    • Historical Version
  6. ASHRAE Portuguese


    Portuguese -- Standard 90.1-2007 -- SI -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IESNA Co-sponsored)

    • Historical Version
  7. ASHRAE 90.1-2007 (SI)


    Standard 90.1-2007 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

    • Historical Version
  8. ASHRAE 90.1-2004 (SI)


    Standard 90.1-2004 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IESNA Co-sponsored)

    • Historical Version
  9. ASHRAE 90.1-2001 (SI)


    Standard 90.1-2001 (SI) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (IESNA cosponsored; ANSI approved; Continuous Maintenance Standard)

    • Historical Version
  10. ASHRAE 90.1-1999 (SI)


    Standard 90.1-1999 (SI) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (IESNA cosponsored; ANSI approved)

    • Historical Version
  11. ASHRAE 90.1-1989 (Windows version)


    Standard 90.1-1989 (Windows version) -- Energy Efficient Design of New Buildings Except Low-Rise Residential Buildings

    • Historical Version
  12. ASHRAE 90-1975


    Standard 90-1975 -- Energy Conservation in New Building Design

    • Historical Version
 

Amendments, rulings, supplements, and errata

  1. ASHRAE 90.1-2022 (SI) Errata (July 1, 2024)

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    Errata to Standard 90.1-2022 (SI Edition) -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  2. ASHRAE IC 90.1-2022-5

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    Interpretation IC 90.1-2022-5 of Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  3. ASHRAE IC 90.1-2022-4

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    Interpretation IC 90.1-2022-4 of Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  4. ASHRAE 90.1-2022 Addendum z

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    Addendum z to Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  5. ASHRAE 90.1-2022 Addendum x

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    Addendum x to Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  6. ASHRAE 90.1-2022 Addendum v

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    Addendum v to Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  7. ASHRAE 90.1-2022 Addendum t

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    Addendum t to Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  8. ASHRAE 90.1-2022 Addendum r

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    Addendum r to Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  9. ASHRAE 90.1-2022 Addendum p

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    Addendum p to Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  10. ASHRAE 90.1-2022 (SI) Errata (April 26, 2024)

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    Errata to Standard 90.1-2022 (SI Edition) -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  11. ASHRAE 90.1-2022 Addendum n

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    Addendum n to Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  12. ASHRAE 90.1-2022 Addendum k

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    Addendum k to Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  13. ASHRAE 90.1-2022 Addendum o

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    Addendum o to Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  14. ASHRAE 90.1-2022 Addendum q

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    Addendum q to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  15. ASHRAE 90.1-2022 Addendum m

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    Addendum m to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  16. ASHRAE 90.1-2022 Addendum j

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    Addendum j to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  17. ASHRAE 90.1-2022 Addendum i

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    Addendum i to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  18. ASHRAE 90.1-2022 Addendum h

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    Addendum h to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  19. ASHRAE 90.1-2022 (SI) Errata (February 8, 2024)

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    Errata to Standard 90.1-2022 (SI Edition) -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  20. ASHRAE IC 90.1-2022-3

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    Interpretation IC 90.1-2022-3 of Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  21. ASHRAE IC 90.1-2022-2

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    Interpretation IC 90.1-2022-2 of Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  22. ASHRAE IC 90.1-2022-1

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    Interpretation IC 90.1-2022-1 of Standard 90.1-2022 -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  23. ASHRAE 90.1-2022 (SI) Errata (November 14, 2023)

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    Errata to Standard 90.1-2022 (SI Edition) -- Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  24. ASHRAE 90.1-2022 (SI) Errata (November 1, 2023)

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    Errata to Standard 90.1-2022 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  25. ASHRAE 90.1-2022 (SI) Errata (October 24, 2023)

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    Errata to Standard 90.1-2022 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  26. ASHRAE 90.1-2022 (SI) Errata (October 2, 2023)

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    Errata to Standard 90.1-2022 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  27. ASHRAE 90.1-2022 Addendum b

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    Addendum b to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  28. ASHRAE 90.1-2022 (SI) Errata (September 15, 2023)

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    Errata to Standard 90.1-2022 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  29. ASHRAE 90.1-2022 Addendum cw

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    Addendum cw to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  30. ASHRAE 90.1-2022 Addendum ca

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    Addendum ca to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  31. ASHRAE 90.1-2022 Addendum f

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    Addendum f to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  32. ASHRAE 90.1-2022 Addendum d

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    Addendum d to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  33. ASHRAE 90.1-2022 (SI) Errata (June 15, 2023)

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    Errata to Standard 90.1-2022 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  34. ASHRAE 90.1-2022 Addendum bo

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    Addendum bo to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  35. ASHRAE 90.1-2022 Addendum a

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    Addendum a to Standard 90.1-2022 -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)

  36. ASHRAE 90.1-2022 (SI) Errata (January 19, 2023)

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    Errata to Standard 90.1-2022 (SI Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings (ANSI Approved; IES Co-sponsored)