Historic schools are the building types where climatic comfort requirements of students, influencing the learning process have to be maintained. These buildings face deteriorations in long periods by especially climatic parameters, causing insufficient conditions for the students. The diagnostic process for historic school buildings is important in order to investigate the existing problems on the envelope and climatic comfort conditions before implementation of intervention strategies. The combined effect of climatic parameters, changing heat gain and losses, thermal sensation and energy efficiency have to be examined in order to lower the energy consumption, create comfortable climatic environment for students which directly influence their concentration and health in the classrooms. In this context the level of climatic conditions in different oriented classrooms are investigated by thermal measurements and concurrently conducted survey with questionnaires in historic Ulugazi Primary School in Izmit, Turkey. During the measurement process of climatic parameters, a survey was conducted among 40 students in two classrooms, located on North-northwest, (NNW) and South-southeast, (SSE) orientations. The findings on distribution of individual thermal satisfaction sensation of the students obtained by the questionnaires were compared to the graphics of distribution of temperature, air velocity, humidity measurement values.