ASHRAE 55-2017 Thermal Environmental Conditions for Human Occupancy
ASHRAE 55-2017 Thermal Environmental Conditions for Human Occupancy specifies conditions for acceptable thermal environments and is intended for use in design, operation, and commissioning of buildings and other occupied spaces. The 2017 edition of ANSI/ASHRAE Standard 55 incorporates seven published addenda to the 2013 edition, and provides three compliance methods: a graphic method for simple situations, an analytical method for more general cases and a method that uses elevated air speed to provide comfort. The standard has a separate method for determining acceptable thermal conditions in occupant-controlled naturally conditioned spaces. Given the widespread and easy accessibility of computing power and third-party implementations of the analytical method, it is expected that more users will favor the comprehensive analytical methods over the graphical method.
You can also read ASHRAE Pocket Guide for Air Conditioning, Heating, Ventilation, Refrigeration, 8th SI & IP edition
ASHRAE 55-2017 Thermal Environmental Conditions for Human Occupancy
- SECTION PAGE
![ASHRAE 55-2017]()
- Foreword
- Purpose
- Scope
- Definitions
- General Requirements
- Conditions That Provide Thermal Comfort
- Design Compliance
- Evaluation of Comfort in Existing Buildings
- References
- A: Methods for Determining Operative Temperature
- B: Computer Program for Calculation of PMV-PPD
- C: Procedure for Calculating Comfort Impact of Solar Gain on Occupants
- D: Procedure for Evaluating Cooling Effect of Elevated Air Speed Using SET
- E: Conditions That Provide Thermal Comfort
- F: Use of Metabolic Rate Data
- G: Clothing Insulation
- H: Comfort Zone Methods
- I : Local Discomfort and Variations with Time
- J: Occupant-Controlled Naturally Conditioned Spaces
- K: Sample Design Compliance Documentation
- L: Measurements, Surveys, and Evaluations of Comfort in Existing Spaces: Parts 1 and 2
- M: Bibliography and Informative References
- N: Addenda Description
Other noteworthy additions to the standard include clarification of the three comfort calculation approaches in the elevated air speed section; simplification of Appendix A to a single procedure for calculating operative temperature; an update to the scope to ensure the standard isnât used to override health, safety, and critical process requirements; a new requirement for calculating change to thermal comfort resulting from direct solar radiation; and removal of permissive language throughout the standard.
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