ASHRAE 55 : 2017

Foreword
1 Purpose
2 Scope
3 Definitions
4 General Requirements
5 Conditions that Provide Thermal Comfort
6 Design Compliance
7 Evaluation of Comfort in Existing Buildings
8 References
Normative Appendix A: Methods for Determining Operative
          Temperature
Normative Appendix B: Computer Program for Calculation of
          PMV-PPD
Normative Appendix C: Procedure for Calculating Comfort
         Impact of Solar Gain on Occupants
Normative Appendix D: Procedure for Evaluating Cooling Effect
          of Elevated Air Speed Using SET
Informative Appendix E: Use of Metabolic Rate Data
Informative Appendix F: Clothing Insulation
Informative Appendix G: Comfort Zone Methods
Informative Appendix H: Procedure for Evaluating Cooling Effect
            of Elevated Air Speed Using SET
Informative Appendix I: Local Discomfort and Variations with Time
Informative Appendix J: Occupant-Controlled Naturally Conditioned
            Spaces
Informative Appendix K: Sample Design Compliance Documentation
Informative Appendix L: Measurements, Surveys, and Evaluation of
            Comfort in Existing Spaces: Parts 1 and 2
Informative Appendix M: Bibliography and Informative References
Informative Appendix N: Addenda Description

Describes the combinations of indoor thermal environmental factors and personal factors that will produce thermal environmental conditions acceptable to a majority of the occupants within the space.

2.1 The environmental factors addressed in this standard aretemperature, thermal radiation, humidity, and air speed; thepersonal factors are those of activity and clothing.2.2 It is intended that all of the criteria in this standard beapplied together, as comfort in the indoor environment iscomplex and responds to the interaction of all of the factorsthat are addressed herein.2.3 This standard specifies thermal environmental conditionsacceptable for healthy adults at atmospheric pressure equivalentto altitudes up to 3000 m (10,000 ft) in indoor spacesdesigned for human occupancy for periods not less than 15minutes.2.4 This standard does not address such nonthermal environmentalfactors as air quality, acoustics, and illumination orother physical, chemical, or biological space contaminantsthat may affect comfort or health.2.5 This standard shall not be used to override any safety,health, or critical process requirements.