The researchers studied how a special type of building facade called a double skin facade can save energy in Tehran's climate. They modeled an office building with and without this type of facade and used a simulation program to compare them. The double skin facade reduced the need for air conditioning by around 16 to 20%. This means that buildings with this special facade can use less energy for cooling, helping both the environment and building owners save money on electricity bills. To make sure the facade works well, designers should also think about things like ventilation, controlling how much light comes in, and using shading devices. By paying attention to these factors, buildings can be more energy efficient and comfortable for the people inside.