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About This Item

 

Full Description

ASHRAE/IES Standard 100 provides criteria for reduced energy consumption through improved energy efficiency and performance in existing buildings.

Among changes to the 2018 edition of the standard are the following:

  • Updated Purpose to more clearly state the goal of the standard.
  • Addition of normative primary energy EUI target tables in Sections 7 and 10 and in Normative Annex A, and a primary energy EUI calculation option in Annex A, to add an alternative compliance path for the qualified person seeking compliance with the standard
  • Clarification of energy audit requirements for buildings without energy targets by qualifying when a Level 1 audit can be used to comply with the standard
  • Addition of new Informative Annex M to provide guidance on selecting the appropriate building type
 

Document History

  1. ASHRAE 100-2024


    Standard 100-2024 -- Energy and Emissions Building Performance Standard for Existing Buildings (ANSI/IES Approved)

    • Most Recent
  2. ASHRAE 100-2018

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    Standard 100-2018 -- Energy Efficiency in Existing Buildings (ANSI Approved/IES Co-sponsored)

    • Historical Version
  3. ASHRAE 100-2015


    Standard 100-2015 -- Energy Efficiency in Existing Buildings (ANSI Approved/IES Co-sponsored)

    • Historical Version
  4. ASHRAE 100-2006


    Standard 100-2006 -- Energy Conservation in Existing Buildings (ANSI/IES Approved)

    • Historical Version
  5. ASHRAE 100-1995


    Standard 100-1995 -- Energy Conservation in Existing Buildings (ANSI Approved/IESNA cosponsored)

    • Historical Version
 

Amendments, rulings, supplements, and errata

  1. ASHRAE 100-2018 Addendum k

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    Addendum k to Standard 100-2018 -- Energy Efficiency in Existing Buildings (ANSI Approved/IES Co-sponsored)

  2. ASHRAE 100-2018 Addendum j

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    Addendum j to Standard 100-2018 -- Energy Efficiency in Existing Buildings (ANSI Approved/IES Co-sponsored)

  3. ASHRAE 100-2018 Addendum e

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    Addendum e to Standard 100-2018 -- Energy Efficiency in Existing Buildings (ANSI Approved/IES Co-sponsored)

  4. ASHRAE 100-2018 Addendum i

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    Addendum i to Standard 100-2018 -- Energy Efficiency in Existing Buildings (ANSI Approved/IES Co-sponsored)

  5. ASHRAE 100-2018 Addendum d

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    Addendum d to Standard 100-2018 -- Energy Efficiency in Existing Buildings (ANSI Approved/IES Co-sponsored)

  6. ASHRAE 100-2018 Addendum f

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    Addendum f to Standard 100-2018 -- Energy Efficiency in Existing Buildings (ANSI Approved/IES Co-sponsored)

  7. ASHRAE 100-2018 Addendum c

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    Addendum c to Standard 100-2018 -- Energy Efficiency in Existing Buildings (ANSI Approved/IES Co-sponsored)

  8. ASHRAE 100-2018 Addendum b

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    Addendum b to Standard 100-2018 -- Energy Efficiency in Existing Buildings (ANSI Approved/IES Co-sponsored)