The studies aimed to evaluate a Trombe wall, a solar wall, which is a critical component of passive solar strategies in energy usage. It is a very compact wall and can be south-facing or north-facing, which is painted black and made of exclusive material that absorbs a lot of heat. The main advantage of the Trombe wall is that they are often easily built from locally obtainable materials, very dependable, and having less repair, maintenance, and operation costs. In this study, a BASECASE model were simulate with “Design Builder" software based on “Energy Plus" with the passive solar technique of Trombe wall in Egypt of a model of residential building with two façade alternative base case. The research has shown that Trombe wall has the possibility of providing acceptable internal thermal comfort through "Mixed-Mode" ventilation strategy in hot climate, this is important in determining the possibility of Trombe wall in incorporating "Mixed-Mode" ventilation reducing energy usage in cooling demands. The conclusion of this research that Trombe walls can reduce the cooling load by 75% compared to the base case with annual energy savings.