 • Although the summer ventilation can help to ameliorate the uncomfortable conditions in general, in regions closer to the equator is open to question.Hence, it becomes very important to insulate and shade the Trombe wall to minimize overheating during summer period.• It is a very climate-dependent system and it is also found that different heating degree days and incident solar radiation levels have a significant role in the energy savings and CO2 emission reductions of Trombe walls.