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The Six Agents of Heat Stress
 Ambient temperature，radiant temperature，
humidity，and air movement are the four
basic environmental variables：the
metabolic rate and clothing (insulation and
moisture permeability characteristics)
provide the behavioral variables that
affect human response to thermal
environment
Thermal Comfort
 Thermal comfort is defined as：that
condition of mind which expresses
satisfaction with the thermal environment
 A.the body is in heat balance
 B.sweat rate is within comfort limits
 C.mean skin temperature is within comfort
limits
Thermal Comfort