Indoor thermal environments can significantly influence human health and comfort. In addition,
thermal comfort is very important for architects and engineers to ensure comfort and health of occupant in
the building [4]. Since the late 20th century, the PMV (Predicted Mean Vote) model developed by Fanger
has been widely used throughout the world. Although the PMV model is based on the database of
European and North American subjects, many researchers around the world have conducted experiments
in climate chambers and have demonstrated its validity [5]. However, many researchers have not been
applied in sub-tropical climates such as Thailand. Thailand is located in sub-tropical zone at latitude
13°18´N and longitude 100°27´E, according to the climatological method of classification, the weather of
Thailand is classified as “Humid Subtropical Climate”. For university buildings, indoor thermal
environments influence on learning of students. In addition, comfortable of student will be able to
increase learning. Thus, this work was to study of thermal comfort in university buildings in Thailand
under air condition room.