ANSI/ASHRAE/IESNA Standard 90.1-2007 Buildings

1 ashrae STANDARDASHRAE STANDARDANSI/ ashrae /IESNA Standard (Supersedes ANSI/ASHRAE/IESNA Standard )Includes ANSI/ASHRAE/IESNA Addenda listed in Appendix FEnergy Standard for Buildings Except Low-Rise Residential BuildingsI-P EditionSee Appendix F for approval dates by the ashrae standards Committee, the ashrae Board of Directors,the IESNA Board of Directors, and the American National standards Standard is under continuous maintenance by a Standing Standard Project Committee (SSPC) for whichthe standards Committee has established a documented program for regular publication of addenda or revi-sions, including procedures for timely, documented, consensus action on requests for change to any part ofthe Standard . The change submittal form, instructions, and deadlines may be obtained in electronic form fromthe ashrae Web site, , or in paper form from the Manager of standards .

2 The latest edi-tion of an ashrae Standard may be purchased from ashrae Customer Service, 1791 Tullie Circle, NE,Atlanta, GA 30329-2305. E-mail: Fax: 404-321-5478. Telephone: 404-636-8400 (world-wide), or toll free 1-800-527-4723 (for orders in US and Canada). Copyright 2007 American society of Heating, Refrigerating and Air-Conditioning Engineers, 1041-2336 American society of Heating, Refrigeratingand Air-Conditioning Engineers, Tullie Circle NE, Atlanta, GA Code: 86147 05/10 Errata noted in the list dated 3/8/10 have been Standard Energy Standard for Buildings Except Low-Rise Residential Buildings (I-P Edition)Jointly sponsored byIlluminating engineering society of north ASHRAEThe American society of Heating, Refrigerating and Air-Conditioning Engineers ( ashrae ), founded in 1894, is aninternational organization of some 50,000 members.

3 ashrae fulfills its mission of advancing heating, ventilation, airconditioning, and refrigeration to serve humanity and promote a sustainable world through research, standards writing,publishing, and continuing more information or to become a member of ashrae , visit stay current with this and other ashrae standards and guidelines, visit ashrae has two collections of standards and guidelines available on CD that include one year of unlimited access todownload monthly updates, including addenda, errata, and interpretations. ashrae standards and Guidelines containsthe complete library, and Essential standards contains ashrae s 12 most referenced standards and guidelines. Bothinclude the User s Manuals for Standard and Standard For more information on these products, visit theStandards and Guidelines section of the ashrae bookstore at NOTICES ABOUT THIS STANDARDTo ensure that you have all of the approved addenda, errata, and interpretations for this Standard , visit to download them free of , errata, and interpretations for ashrae standards and guidelines will no longer be distributed with copies of the standards and guidelines.

4 ashrae provides these addenda, errata, and interpretations only in electronic form in order to promote more sustainable use of material provided through funding from the US Department of Energy, licensed to JULIO GORMAZ on 26-Oct-2010. Further reproduction or networking is STATEMENT DEFINING ashrae S CONCERNFOR THE ENVIRONMENTAL IMPACT OF ITS ACTIVITIESASHRAE is concerned with the impact of its members activities on both the indoor and outdoor environment. ashrae smembers will strive to minimize any possible deleterious effect on the indoor and outdoor environment of the systems andcomponents in their responsibility while maximizing the beneficial effects these systems provide, consistent with acceptedstandards and the practical state of the s short-range goal is to ensure that the systems and components within its scope do not impact the indoor andoutdoor environment to a greater extent than specified by the standards and guidelines as established by itself and otherresponsible an ongoing goal, ashrae will, through its standards Committee and extensive technical committee structure.

5 Continue to generate up-to-date standards and guidelines where appropriate and adopt, recommend, and promote those newand revised standards developed by other responsible its Handbook, appropriate chapters will contain up-to-date standards and design considerations as the material issystematically will take the lead with respect to dissemination of environmental information of its primary interest and will seekout and disseminate information from other responsible organizations that is pertinent, as guides to updating standards effects of the design and selection of equipment and systems will be considered within the scope of the system sintended use and expected misuse. The disposal of hazardous materials, if any, will also be s primary concern for environmental impact will be at the site where equipment within ashrae s scopeoperates.

6 However, energy source selection and the possible environmental impact due to the energy source and energytransportation will be considered where possible. Recommendations concerning energy source selection should be made byits Standing Standard Project Committee TC: TC , Systems Energy UtilizationSPLS Liaisons: Hugh F. Crowther and Ross MontgomeryASHRAE Staff Liaison: Steven C. FergusonIESNA Liaison: Rita M. HarroldJerry W. White, Jr., Chair*James M. Calm, Vice-Chair*Michael Schwedler, Vice-Chair*Carol E. Marriott, Vice-ChairWagdy Anis*Anthony ArboreKarim Amrane*William P. Bahnfleth*Peter A. Baselici*Van D. Baxter*Denise M. BeachDonald L. Beaty*Valerie L. BlockDonald M. Brundage*Ken Brendan*Ernest A. ConradCharles C. Cottrell*Roy Crane*Joseph J.

7 Deringer*Keith I. Emerson*Drake H. Erbe*Thomas A. FarkasCharles R. Foster, IIIA llan Fraser*James A. Garrigus*Jason J. Glazer*S. Pekka Hakkarainen*Katherine G. Hammack*Susanna S. HansonRichard V. Heinisch*Ned B. HemingerRandall T. Higa*John F. Hogan*William G. Holy*Hyman M. Kaplan*Larry Kouma*Ronald D. Kurtz*Samantha H. LaFleurMichael D. Lane*Dean E. LewisRichard LordKenneth Luther*Ronald Majette*Itzhak H. Maor*R. Christopher MathisMerle F. McBrideMichael W. MehlHarry P. MisurielloLouis J. MolininiJohn Montgomery*Frank T. MorrisonFrank Myers*Ronald G. NicksonJim A. RanfoneEric E. Richman*Michael I. Rosenberg*Steven Rosenstock*Robert D. Ross*David A. Schaaf, Jr.*Leonard C. Sciarra*Bipin Vadilal Shah*Stephen V. Skalko*Frank A. Stanonik*Dennis Sczomak*Joseph K. TingCedric S. Trueman*Martha G.

8 VanGeemCarl Wagus*McHenry Wallace, Jr.*Richard D. Watson*David Weitz*Robin WilsonMichael W. WoodfordDonald R. WulfinghoffStanley W. Zajac*Denotes members of voting status when this Standard was approved for publication. American society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. ( ). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ashrae 's prior written material provided through funding from the US Department of Energy, licensed to JULIO GORMAZ on 26-Oct-2010. Further reproduction or networking is Standard (I-P Edition)3 CONTENTSANSI/ ashrae /IESNA Standard Standard for Buildings Except Low-Rise Residential Buildings (I-P Edition) 41 Purpose .. 42 Scope.

9 43 Definitions, Abbreviations, and Acronyms .. 44 Administration and 155 Building Envelope .. 176 Heating, Ventilating, and Air Conditioning .. 307 Service Water 558 589 Lighting .. 5810 Other Equipment .. 6511 Energy Cost Budget Method .. 6612 Normative References .. 74 Normative Appendix A: Rated R-Value of Insulation and Assembly U-Factor, C-Factor, and F-Factor Determinations ..77 Normative Appendix B: Building Envelope Climate Appendix C: Methodology for Building Envelope Trade-Off Option in Subsection ..115 Normative Appendix D: Climatic Data ..125 Informative Appendix E: Informative References ..170 Informative Appendix F: Addenda Description Appendix G: Performance Rating Method ..175 NOTEWhen addenda, interpretations, or errata to this Standard have been approved, they can be downloaded free of charge from the ashrae Web site at Copyright 2007 American society of Heating,Refrigerating and Air-Conditioning Engineers, Tullie Circle NEAtlanta, GA rights reserved.

10 American society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. ( ). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ashrae 's prior written material provided through funding from the US Department of Energy, licensed to JULIO GORMAZ on 26-Oct-2010. Further reproduction or networking is Standard (I-P Edition)(This foreword is not part of this Standard . It is merelyinformative and does not contain requirements necessaryfor conformance to the Standard . It has not beenprocessed according to the ansi requirements for astandard and may contain material that has not beensubject to public review or a consensus objectors on informative material are notoffered the right to appeal at ashrae or ansi .)