Physiologically thermal comfort condition is a limit of temperature and
humidity. ,in which thermal control mechanism of human body is in its
least activity . thermal comfort conditions not only have impact on sizes of
heating and cooling equipment ,but also affects the thickness of insulation,
and .energy, consumption of buildings. It is necessary to define thermal
comfort condition for different climatic of Iran , in order to maintain
comfort for inhabitants and also col1sclveenergy. In this paper thermal
comfort condition for Tehran considering .energy conservation is
introduced . the proposed thermal limits maintains proper internal
conditions, reduces fossil fuel coltsUmpti6n during cold periods and
electrical energy in hot periods of year
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