Air distribution is extensively used for thermal consolation. The distribution of air is necessarily non uniform with a few subzones withinside the occupied region cooler than the others, which differentiated the thermal choices of occupants. Non uniform air distribution can also additionally go to pot thermal consolation which make discomfort to the end user. This takes a look at proposes to make use of non-uniformity of air distribution to enhance the pleasure of thermal choices. This study investigated the air change effectiveness and temperature variation within a common close room using the air discharged through the circular tube type duct. The experiment has to be conducted with a conditioned air discharged through the duct maintained at different locations vertically withinside the test space. The test point is marked in test room at 1m distance from the duct position. The vertical temperature variation recorded using thermocouple ladder which placed at test point. Thermocouple ladder of 3m having 30 thermocouples set vertically on it at 10cm distance from each to collect the temperature readings is used in experiments. The present study gives the comparative study of temperature distribution along the conditioned air exhaust duct position and which support to examine the optimise location of duct withinside the closed room.