This paper explores how the design of a building's outer layer can help control its temperature, making it more energy-efficient and comfortable. By using shading devices and reducing heat from sunlight, buildings can save energy. The focus is on improving the technology of building exteriors to maintain indoor comfort while promoting sustainability. Designing smart building envelopes is crucial for ensuring a building is energy-efficient and cozy. The goal is to cut down on energy use in constructing buildings to combat the energy crisis we face today. The key idea is that a well-designed building envelope can greatly impact the comfort levels of people inside.