Biometric Classes of Human Comfort Based on WCI

WCI Thermal comfort perception
10 < WCI Comfortable
-1 < WCI < 10 Slight discomfort
-10 < WC I < -1 Cold
-18 < WCI < -10 Very cold
-27 < WCI < -18 Possible frostbite
-35 < WCI < -27 Frostbite within 10 to 30 min
-47 < WCI < -35 Frostbite within 5 to 10 min
WCI < -47 Rapid frostbite within 30 s