In recent years, the adaptive model of thermal comfort has gained traction as a more robust alternative to fixed set-point-driven design, which considers various factors that impact human comfort, such as humidity, air velocity, mean radiant temperature, and ambient temperature. Nonetheless, it is crucial to recognize the limitations of such models
Heat stress profoundly affects well-being in hot climates. With the rise of energy-efficient, naturally
ventilated buildings, understanding their impact on heat stress is crucial. This is particularly
significant in countries like India, grappling with climate change-induced heat waves. The study
focusses on the factor of heat stress in adaptive thermal comfort models, emphasizing the need for
a more holistic approach to indoor comfort factors. Insights gained can lead to improved strategies
for optimal thermal comfort and reduced heat stress risks, vital for occupant health. Indoor WBGT
ranged from 16°C to 33°C for various envelopes, averaging 28°C (RCC), 24°C (Brick), and 22°C
(EPS). Indoor air velocity of 0.9-1.8 m/s lowered WBGT by 0.15°C or 0.27°C annually. Discomfort
hours were ~5,000 (RCC), 3,600 (Brick), and 3,200 (EPS), peaking in May-June at 40°C outdoor DBT.
Proper insulation and ventilation are crucial for comfort and heat stress reduction. By considering
diverse factors affecting indoor comfort, it offers insights to create safe and comfortable indoor
environments, especially in regions prone to heat stress. The findings advocate a balanced approach
that combines effective insulation and ventilation strategies for optimal occupant well-being.