Appendices; Appendix C – Heat Index And Health Effects - Extech Instruments RH25 User Manual

Appendices
Appendix A – Heat Index based on Temperature (
Note: Italic values are Heat Index based on the Temperature (left column) and Relative Humidity (top row).
o
F
o
80 F
o
85 F
o
90 F
o
95 F
o
100 F
o
105 F
o
110 F
Appendix B – Heat Index based on Temperature (
Note: Italic values are Heat Index based on the Temperature (left column) and Dew Point (top row).
o
F
o
80 F
o
85 F
o
90 F
o
95 F
o
100 F
o
105 F
o
110 F
Appendix C – Heat Index and Health Effects
Heat Index of 80 to 90
Heat Index of 90 to 105
Heat Index of 105 to 130
Heat Index of 130
The Heat Index is determined using the dry bulb temperature and the relative humidity. It is
based on charts available through the U.S. National Weather Service. The Heat Index represents
how an average person feels relative to climate conditions. For a given temperature, the higher
the humidity, the higher the heat index will be.
90% 80%
85 84
101 96
121 113
133
55 DP 60 DP
55 60
80 80
84
o
F: Fatigue possible with prolonged exposure and physical activity
o
F: Sunstroke, heat cramps, and heat exhaustion possible
o
F: Sunstroke, heat cramps, heat exhaustion likely; heat stroke possible
o
F or greater: Heat stroke highly likely with continued exposure
70% 60%
82 81
92 90
105 99
122 113
142 129
148
65 DP 70 DP
65 83
81 89
86 95
91 101
5 RH25‐EU‐EN v1.0 5/13
o
F) vs. Relative Humidity (%)
50% 40%
80 79
86 84
94 90
105 98
118 109
133 121
135
o
F) vs. Dew Point (DP)
75 DP 80 DP
84 87
93 99
100 107
106 114
113 121
127
134
85 DP
107
117
125
131
138
145