International Journal of Engineering and Technology

Indoor temperature of a building is based on the thermal performance of the building’s roof and wall temperatures. The quantity of heat transmitted by the roof and walls is radiated into the inside of the building. The heat transmitted to the indoor is directly proportional to the inside temperature of the roof and walls. The indoor temperature varies with respect to the R Values of the materials used. The expectation of the inmates is to get thermal neutrality or comfort level. Buildings which are not able to provide comfort are thermally inefficient. If the indoor of the building gains more and more thermal energy from outdoor, above the comfort level then, it becomes a hyper thermic building. If the indoor of a building loses more and more thermal energy to the outdoor below the comfort level then it becomes a hypo thermic building. The hyper or hypo thermic states further lead to mega thermic and meso - thermic states. Too high or low indoor temperatures of any building result in non-living conditions of the occupants. This study likes to find out a relationship between the indoor temperature and thermal efficiency of a building in relation to comfort temperature. A building which provides comfort temperature is supposed to possess the maximum thermal efficiency (100%). A building’s indoor when reaches the human body temperature is supposed to possess zero thermal efficiency. In the same way, when it reach a low temperature to the same extent from the comfort level its efficiency becomes zero. The efficiency lies between comfort and mega or meso - thermic states of indoor temperatures.