“…Wang et al [21] used a TIR camera to measure the upper body temperatures of a subject and directly control the indoor set-point temperature. Faridah et al [22] used skin temperatures of the forehead, nose, cheek, and chin of 17 male subjects in an artificial neural network to predict their thermal states, reaching a highest accuracy (on a seven-point scale) of 69%. Li et al [23] used TIR cameras to measure skin temperature at six local body parts (the forehead, nose, cheeks, ears, mouth, and neck), predicting the thermal sensations of 12 subjects with an average accuracy of 85%.…”