buildings for heating and cooling purpose use a large amount of non renewable energy. Now a day�s renewable energy such as solar energy is a suitable solution for reduce the excess use of non renewable energy. Passive solar sy stems do not use the mechanical or electrical equipments to store and transfer the thermal energy. Trombe wall is a passive solar system and it is based on the natural conduction,convection and heat storage. This works contains numerical study on the pass ive solar winter heating system. Study the distrib ution of temperature in wall,living space of room and the effect of outlet position in a system . Analysis can be done for 2 - D model and Present work involves natural ventilation and convective mode of heat t ransfer. Results shows that temperature distributions depend up on the quantity of heat flux gain by Trombe wall and positions of the outlet also affect the performance of the system. https://www.ijiert.org/paper-details?paper_id=140749