Historical
ISO 7243:1989
Hot environments - Estimation of the heat stress on working man, based on the WBGT-index (wet bulb globe temperature)
Gives a method, which can easily be used in an industrial environment for evaluating the stresses on a individual. It applies to the evaluation of the mean effect of heat on man during a period representative of his activity but it does not apply to very short periods, nor to zones of comfort.
International Organization for Standardization [iso]