Various levels of adaptation in four seasons of a year in cold climatic zone of China

To reveal the law of various levels of adaption in four seasons of a year in naturally ventilated residential buildings in cold climate zone of China, carries out the field survey of thermal comfort, and uses the adaptive coefficient λ proposed in adaptive PMV model（aPMV）to quantitatively calculate the levels of adaption in different seasons. The results show that there exist obvious differences in relationship of thermal sense and temperature in four seasons. Adaption-levels of both autumn and winter are low, and those of spring and summer are high. The adaptive coefficient λ value varies for different seasons which is -1.24 for spring, 0.45 for summer, -0.38 for autumn and -0.23 for winter, respectively. The resultant classification levels for indoor thermal and humid environment calculated with these four λ values differ from that in Evaluation standard for indoor thermal and humid environment in civil buildings.