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Heat Discomfort Zones

Maximum work load vs. temperature and relative humidity.

Heat Discomfort Zones
TemperatureMaximum Recommended Work Load
Relative Humidity (%)
oFoC30406080
80 27 Very Heavy Very Heavy Very Heavy Heavy
90 32 Very Heavy Heavy Moderate Light
100 38 Heavy Moderate Light Not recommended
110 43 Moderate Light Not recommended Not recommended
120 49 Light Not recommended Not recommended Not recommended

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