Current thermal comfort technologies for future tourism, known for their high energy usage, often fall short by creating uniformly neutral conditions that lack efficiency. The key body areas crucial for tourist thermal comfort are the wrists, feet, and head. Thus, there's a pressing need for technologies that specifically target these areas to optimize thermal comfort. Changes in the thermal environment are observed to influence the heart rate variability (HRV) of individuals, indicating fluctuations in their physiological responses to thermal conditions. The primary objective of this study was to identify which HRV indicators significantly affect individual thermal comfort levels. Accurately assessing thermal comfort is essential for energy-efficient environments, yet predicting tourists' thermal comfort proves challenging due to the multitude of influencing factors.