摘要:It is well known that people spend about 90% of their lifetime in buildings where the indoor environment strongly influences their health and productivity. Therefore it is crucial to maintain proper internal conditions, and thus ensure comfort environment for building users. Due to the nature and complexity the thermal comfort is difficult to describe with physical parameters. However there is a number of available methods to assess the indoor conditions and define the comfort level - from simplified methods based on the measurement of basic parameters to complex approach – with the use of computational fluid dynamics engineering tools. The paper presents the outcome of the thermal comfort study for a naturally ventilated office located in Wroclaw (Poland). The chosen physical parameters has been registered in long- and short-term perspective, and later used for defining the boundary conditions and CFD model validation.