Shaktizuru Radiant temperature asymmetry between ceiling and floor, and air aashrae walls must be limited to reduce discomfort. The temperature of the floor, rather than the material of the floor covering, is the most important factor for foot thermal comfort for people wearing shoes. The heights need to adjusted for standing persons. The range of activities of different individuals in the space and the environmental conditions required for those activities should be considered in applying this standard.
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Standard 55 — Thermal Environmental Conditions for Human Occupancy Share This Standard 55 specifies conditions for acceptable thermal environments and is intended for use in design, operation, and commissioning of buildings and other occupied spaces. Purchase For thermal comfort—this is the standard.
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. Since , Standard 55 has been rewritten with a renewed focus on application of the standard by practitioners and use of clear, enforceable language. Requirements are now clearly stated and calculation procedures appear sequentially.
All informative background information has been moved to informative appendices. Documentation requirements to show that a design complies with Standard 55 are contained in Section 6, and a sample compliance form is provided in Appendix K. Both of these sections are clarified and streamlined for use by owners and third-party rating systems.
Interpretation for Standard 55-1981 and 55-1992
Thermal comfort is the condition of mind that expresses satisfaction with the thermal environment and is assessed by subjective evaluation. Exceedance hours[ edit ] Exceedance hour is the number of occupied hours within a defined time period in which the environmental conditions in an occupied space are outside the comfort zone. If these requirements are met and the environmental conditions inside the building fall within the indicated ranges, then compliance is achieved. Compliance is achieved if the conditions provide thermal neutrality, measured as falling between The methodology is based on the SET Standard Effective Temperature model, which provides a way to assign an effective temperature at a standard metabolic rate, and clothing insulation values to compare thermal sensations experienced at a range of thermal conditions. To reduce draft risk at temperatures below Operative temperatures may not fluctuate more than 1.
ASHRAE 55-1992 PDF