You are more then likely correct, but what I am saying or trying to say: Is measuring either skin temperature or core temperature really measuring total heat loss from the body? Since compensatory mechanisms exist within the body (shunting, shivering, etc.), core and skin temperatures will be maintained until heat loss exceeds the body’s ability to maintain thermic-homeostasis. Therefore measuring core or skin temperatures are only a measurement of the body’s ability to maintain thermic-homeostasis, not heat loss. To the best of my understanding measuring core and/or skin temperature is not measuring heat loss through radiation, convection and conduction.

It would seem to me, if one wants to measure total heat loss, then thermal imaging is necessary.

Pete