ASHRAE STANDARD Thermal Environmental Conditions for …

1 ASHRAE STANDARDASHRAE STANDARDA merican Society of Heating, Refrigeratingand Air-Conditioning Engineers, Tullie Circle NE, Atlanta, GA forHuman OccupancyANSI/ ASHRAE STANDARD 55-2004(Supersedes ANSI/ ASHRAE STANDARD 55-1992)This STANDARD was approved by the ASHRAE standards Committee on January 24, 2004; by the ASHRAE Board ofDirectors on January 29, 2004; and by the American National standards Institute on April 16, STANDARD is under continuous maintenance by a Standing STANDARD Project Committee (SSPC) for which theStandards 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 stan-dard.

2 The change submittal form, instructions, and deadlines may be obtained in electronic form from the ASHRAEWeb site, , or in paper form from the Manager of standards . The latest edition of an ASHRAES tandard may be purchased from ASHRAE Customer Service, 1791 Tullie Circle, NE, Atlanta, GA : Fax: 404-321-5478. Telephone: 404-636-8400 (worldwide), or toll free 1-800-527-4723 (for orders in US and Canada). Copyright 2004 ASHRAE , 1041-2336 Licensed to Angelica Ospina Alvarado. ANSI order X_60223. Downloaded 5/9/2008 11:03 AM. Single user license only. Copying and networking NOTEThis American National STANDARD (ANS) is a national voluntary consensus STANDARD developed under the auspices of the AmericanSociety of Heating, Refrigerating and Air-Conditioning Engineers ( ASHRAE ).

3 Consensus is defined by the American National StandardsInstitute (ANSI), of which ASHRAE is a member and which has approved this STANDARD as an ANS, as substantial agreement reachedby directly and materially affected interest categories. This signifies the concurrence of more than a simple majority, but not necessarilyunanimity. 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 obtains consensus through participation of its national and international members, associated societies, and standards are prepared by a Project Committee appointed specifically for the purpose of writing the STANDARD .

4 TheProject 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 interestson all Project Committees. The 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 ,d. permission to reprint portions of the INDUSTRIAL ADVERTISING POLICY ON STANDARDSASHRAE 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.

5 The creation of ASHRAE standards and Guidelines is determined by the need for them, and conformance to them is completely referring to this STANDARD or Guideline and in marking of equipment and in advertising, no claim shall be made, eitherstated or implied, that the product has been approved by uses its best efforts to promulgate standards and Guidelines for the benefit of the public in light of availableinformation and accepted industry practices. However, ASHRAE does not guarantee, certify, or assure the safety orperformance of any products, components, or systems tested, installed, or operated in accordance with ASHRAE s Standardsor Guidelines or that any tests conducted under its standards or Guidelines will be nonhazardous or free from standards COMMITTEE 2003-2004 Van D.

6 Baxter, ChairDavor Novosel, Vice-ChairDonald B. BivensDean S. BorgesPaul W. CabotCharles W. Coward, F. CrowtherBrian P. DoughertyHakim ElmahdyMatt R. HarganRichard D. HermansJohn F. HoganFrank E. JakobStephen D. KennedyDavid E. KnebelFrederick H. KohlossMerle F. McBrideMark P. ModeraCyrus H. NasseriGideon ShavitDavid R. TreeThomas H. WilliamsJames E. WoodsRoss D. Montgomery, BOD ExOKent W. Peterson, COClaire B. Ramspeck, Manager of StandardsASHRAE STANDARD Project Committee 55 Cognizant TC: TC , Physiology and Human EnvironmentSPLS Liaison: Frank E. JakobWayne A. Dunn, Chair*Byron W. JonesDipak J. ShahGail S. Brager, Vice-Chair*Joseph N. KnappPeter Simmonds*Gaetano AlfanoAlison G.

7 Kwok*Jerry M. Sipes*Larry G. BerglundHal Levin*Elia M. Sterling*Karl A. BrownArsen K. MelikovBenjamin P. Sun*Daniel R. ClarkBjarne W. Olesen* (Chair, 1995-1998)S t e v e n T. Ta y l o r *Joseph J. Deringer*Nigel A. OselandShin-Ichi TanabeClifford C. FederspielNicholas B. Rajkovich*Robert W. Tinsley*Jaap J. HogelingGary RawJorn Toftum*Daniel Int-Hout, III* (Chair, 1999-2001)David G. Scheatzle*Stephen C. Turner*James E. Woods*Denotes members of voting status when the document was approved for publicationLicensed to Angelica Ospina Alvarado. ANSI order X_60223. Downloaded 5/9/2008 11:03 AM. Single user license only. Copying and networking STANDARD 55-2004 Thermal Environmental Conditions for Human OccupancySECTIONPAGEF oreword.

8 21 Purpose .. 22 Scope .. 23 24 General Requirements .. 35 Conditions that Provide Thermal Comfort .. 46 117 Evaluation of the Thermal Environment .. 128 References .. 14 Normative Appendix A: Activity 15 Normative Appendix B: Clothing 16 Informative Appendix C: Acceptable Approximation for Operative Temperature .. 20 Normative Appendix D: Computer Program for Calculation of PMV-PPD .. 21 Informative Appendix E: Thermal Environment 23 Informative Appendix F: Bibliography .. 25 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 2004 American Society of Heating,Refrigerating and Air-Conditioning Engineers, Tullie Circle NEAtlanta, GA rights to Angelica Ospina Alvarado.

9 ANSI order X_60223. Downloaded 5/9/2008 11:03 AM. Single user license only. Copying and networking STANDARD 55-2004(This foreword is not part of this STANDARD . It is merelyinformative and does not contain requirements necessaryfor conformance to the STANDARD . It has not been pro-cessed according to the ANSI requirements for a stan-dard and may contain material that has not been subjectto public review or a consensus process.)FOREWORDS tandard 55-2004, Thermal Environmental Conditionsfor Human Occupancy, is a revision of STANDARD STANDARD specifies Conditions in which a specified fractionof the occupants will find the environment thermally accept-able.

10 The revision is a consensus STANDARD that has undergonepublic and ASHRAE review; it incorporates the relevantresearch and experience gained since the 1992 revision. Suchchanges include the addition of the PMV/PPD calculationmethods and the concept of adaptation. The STANDARD isintended for use in design, commissioning, and testing ofbuildings and other occupied spaces and their HVAC systemsand for the evaluation of Thermal environments. Because it isnot possible to prescribe the metabolic rate of occupants, andbecause of variations in occupant clothing levels, operatingsetpoints for buildings cannot be practically mandated by thisstandard.