ANSI/ASHRAE/IES Standard 90.2-2018 (Supersedes ANSI/ASHRAE/IES Standard 90.2-2007) Energy-Efficient Design of Low-Rise Residential Buildings
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Nofurtherreproductionordistributionispermitted. Copyrighted materiallicensedtoUniversityofTorontobyClarivateAnalytics(US)LLC,subscriptions.techstreet.com,downloadedon2019-05-1208:41:36+0000User. ANSI/ASHRAE/IES Standard 90.2-2018 (Supersedes ANSI/ASHRAE/IES Standard 90.2-2007) Energy-Efficient Design of Low-Rise Residential Buildings Approved by the ASHRAE Standards Committee on October 24, 2018, by the ASHRAE Board of Directors on November 10, 2018, by the Illuminating Engineering Society on October 25, 2018, and by the American National Standards Institute on December 7, 2018. This Standard is under continuous maintenance by a Standing Standard Project Committee (SSPC) for which the Standards Committee has established a documented program for regular publication of addenda or revisions, including procedures for timely, documented, consensus action on requests for change to any part of the Standard. Instructions for how to submit a change can be found on the ASHRAE® website (https://www.ashrae.org/continuous-maintenance). The latest edition of an ASHRAE Standard may be purchased from the ASHRAE website (www.ashrae.org) or from ASHRAE Customer Service, 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. E-mail: [email protected]. Fax: 678-539- 2129. Telephone: 404-636-8400 (worldwide), or toll free 1-800-527-4723 (for orders in US and Canada). For reprint per- mission, go to www.ashrae.org/permissions. © 2018 ASHRAE ISSN 1041-2336 Nofurtherreproductionordistributionispermitted. Copyrighted materiallicensedtoUniversityofTorontobyClarivateAnalytics(US)LLC,subscriptions.techstreet.com,downloadedon2019-05-1208:41:36+0000User. ASHRAE Standing Standard Project Committee 90.2 Cognizant TC: 9.6 Systems Energy Utilization SPLS Liaison: Charles Barnaby ASHRAE Staff Liaison: Connor Barbaree IES Liaison: Mark Lien Theresa Weston*, Chair Jeff Inks* LorenRoss* David Goldstein*, Vice-Chair Michael Jouaneh* Amy Schmidt Michael Anschel* James Kendzel* David Shepherd Scott Campbell* Michael Lubliner* Max Sherman Wesley Davis* Christopher Mathis* Wanye Stoppelmoor* Philip Fairey* Merle McBride* Bruce Swiecicki* Charles Foster Harry Misuriello* Martha VanGeem* Sam Francis Andrew Oding* Matt Vargo Aaron Gary* Jerry Phelan* Richard Watson* Armin Hauer Miguel Quinones* Johnathan Humble Steven Rosenstock* * Denotes members of voting status when the document was approved for publication ASHRAE STANDARDS COMMITTEE 2018–2019 Donald M. Brundage, Chair Walter T. Grondzik Erick A. Phelps Wayne H. Stoppelmoor, Jr., Vice-Chair Vinod P. Gupta David Robin Els Baert Susanna S. Hanson Lawrence J. Schoen Charles S. Barnaby Roger L. Hedrick Dennis A. Stanke Niels Bidstrup Rick M. Heiden Richard T. Swierczyna Robert B. Burkhead Jonathan Humble Russell C. Tharp Michael D. Corbat Kwang Woo Kim Adrienne G. Thomle Drury B. Crawley Larry Kouma Craig P. Wray Julie M. Ferguson R. Lee Millies, Jr. Lawrence C. Markel, BOD ExO Michael W. Gallagher Karl L. Peterman Michael CA Schwedler, CO Steven C. Ferguson, Senior Manager of Standards SPECIAL NOTE This American National Standard (ANS) is a national voluntary consensus Standard developed under the auspices of ASHRAE. Consensus is defined by the American National Standards Institute (ANSI), of which ASHRAE is a member and which has approved this Standard as an ANS, as “substantial agreement reached by directly and materially affected interest categories. This signifies the concurrence of more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that an effort be made toward their resolution.” Compliance with this Standard is voluntary until and unless a legal jurisdiction makes compliance mandatory through legislation. ASHRAE obtains consensus through participation of its national and international members, associated societies, and public review. ASHRAE Standards are prepared by a Project Committee appointed specifically for the purpose of writing the Standard. The Project Committee Chair and Vice-Chair must be members of ASHRAE; while other committee members may or may not be ASHRAE members, all must be technically qualified in the subject area of the Standard. Every effort is made to balance the concerned interests on all Project Committees. The Senior Manager of Standards of ASHRAE should be contacted for a. interpretation of the contents of this Standard, b. participation in the next review of the Standard, c. offering constructive criticism for improving the Standard, or d. permission to reprint portions of the Standard. DISCLAIMER ASHRAE uses its best efforts to promulgate Standards and Guidelines for the benefit of the public in light of available information and accepted industry practices. However, ASHRAE does not guarantee, certify, or assure the safety or performance of any products, components, or systems tested, installed, or operated in accordance with ASHRAE’s Standards or Guidelines or that any tests conducted under its Standards or Guidelines will be nonhazardous or free from risk. ASHRAE INDUSTRIAL ADVERTISING POLICY ON STANDARDS ASHRAE Standards and Guidelines are established to assist industry and the public by offering a uniform method of testing for rating purposes, by suggesting safe practices in designing and installing equipment, by providing proper definitions of this equipment, and by providing other information that may serve to guide the industry. The creation of ASHRAE Standards and Guidelines is determined by the need for them, and conformance to them is completely voluntary. In referring to this Standard or Guideline and in marking of equipment and in advertising, no claim shall be made, either stated or implied, that the product has been approved by ASHRAE. Nofurtherreproductionordistributionispermitted. Copyrighted materiallicensedtoUniversityofTorontobyClarivateAnalytics(US)LLC,subscriptions.techstreet.com,downloadedon2019-05-1208:41:36+0000User. CONTENTS ANSI/ASHRAE/IES Standard 90.2-2018 Energy-Efficient Design of Low-Rise Residential Buildings SECTION PAGE Foreword .....................................................................................................................................................................2 1 Purpose.............................................................................................................................................................3 2 Scope ................................................................................................................................................................3 3 Definitions, Abbreviations, and Acronyms.........................................................................................................3 4 Administration and Enforcement .......................................................................................................................6 5 Additions and Alterations ..................................................................................................................................7 6 Performance Requirements ..............................................................................................................................8 7 Requirements....................................................................................................................................................8 8 Verification ......................................................................................................................................................15 9 Reporting Requirements .................................................................................................................................16 10 Normative References ....................................................................................................................................18 Normative Appendix A: Software Requirements...................................................................................................20 Normative Appendix B: Modeling Rule Set ...........................................................................................................21 Normative Appendix C: Air Leakage Testing ........................................................................................................23 Normative Appendix D: Installation Requirements................................................................................................24 Informative Appendix E: Procedures for Generating Prescriptive Paths...............................................................25 Informative Appendix F: Example of NAECA Prescriptive Path............................................................................27 Informative Appendix G: Ducts in Conditioned Space ..........................................................................................29 Informative Appendix H: Step-by-Step Approach for Calculating Lighting Energy Using the Performance Path..............................................................................................................33 Informative Appendix I: Plan Review Inspection Checklist....................................................................................34 Informative Appendix J: Site Inspection Checklist.................................................................................................35 Informative Appendix K: Framing Factors.............................................................................................................37 Annex 1: Reference Standard Reproduction Annex—ASHRAE Standard 169 ...................................................38