本文提出了一个分析指标，用以评估寒冷环境中的热应力，即维持适当热平衡所需的最小衣物隔热（IREQ）。IREQ是根据文献中的传热方程和生理学标准进行的热交换分析得出的。IREQ提供了气候（气温、平均辐射温度、湿度和空气流速）和活动综合影响的综合测量，并作为适当选择合适的衣物隔热值的指南。如果可用的衣物隔热层小于IREQ，则根据可接受的身体冷却水平计算有限暴露时间。引文:研讨会论文，佐治亚州亚特兰大，1984年

An analytical index is presented to evaluate the thermal stress of cold environments in terms of a minimal required clothing insulation (IREQ) for the maintenance of an adequate heat balance. IREQ is derived from a heat exchange analysis based on heat transfer equations and physiological criteria available in the literature. IREQ provides an integrated measure of the combined effects of climate (air temperature, mean radiant temperature, humidity, and air velocity) and activity and serves as a guideline for the appropriate choice of an adequate insulation value of clothing. If available clothing insulation is less than IREQ, a duration limited exposure based on acceptable levels of body cooling is calculated.