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    International Standards for Assessing the Effect of Clothing on Heat Tolerance and Comfort

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    Three standards recently developed by the International Organization for Standardization (ISO) Working Group for Thermal Environments for assessing the thermal load of workers are examined for how they deal with the effect of clothing on the worker's feeling of thermal comfort or heat tolerance. In the standard for assessing thermal comfort, only the thermal insulation of the clothing worn is taken into account, but in the standard for analytical determination of heat stress, values for both the insulation and vapor permeability of the working uniform and protective garments are needed for estimating the worker's heat load. However, data on these thermal properties for protective garments are not available. In the third standard examined, the assessment of heat stress is based on measurement of environmental heat and estimation of metabolic heat, while clothing insulation and permeability are considered to be constant.


    clothing insulation, vapor permeability, heat stress, thermal comfort, discomfort, heat stress standards, heat stress index, International Organization for Standardization (ISO), heat tolerance, Wet-Bulb Globe-Temperature (WBGT) index, Predicted Mean Vote (PMV) comfort index, Predicted Percentage of Dissatisfaction (PPD), climatic conditions

    Author Information:

    Olesen, BW
    Research associate, Technical University of Denmark, Laboratory of Heating and Air Conditioning, Copenhagen,

    Dukes-Dobos, FN
    Adjunct professor of Occupational Health and Ergonomics, University of South Florida, College of Public Health, Tampa, FL

    Committee/Subcommittee: F23.96

    DOI: 10.1520/STP26271S