 An extensive field study was carried out in naturally ventilated residential buildings in Kota Kinabalu, Sabah, Malaysia.This investigation explored the sexes thermal sensitivity to the indoor environment in non-air-conditioned residential buildings.Multiple hierarchical regression for categorical moderator was selected for data analysis; the result showed that as a group females were slightly more sensitive than males to the indoor air temperatures, whereas, under thermal neutrality, it was found that males and females have similar thermal sensation.