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In this study, new environmental temperature( ) and new dry resultant temperature() were proposed by authors. New environmental temperature and new dry resultant temperature are a combination of internal air temperature varies with the height() and 3-dimensional mean radiant temperature(). According to room conditions, and can be derived from the following formulas : and+. In case study, and will be analysed and presented as a basic data for thermal environmental control system in room. This new environmental indices can be used for planning HVAC system and evaluating indoor thermal environment. Finally, and can be recommended for the calculation of air conditioning load and energy requirements