What is the primary function of exterior shades in passive cooling?

The primary function of exterior shades in passive cooling is temperature control. By blocking direct sunlight from entering a building, these shades help reduce indoor temperatures, minimizing the reliance on mechanical cooling systems. This is particularly effective during hot weather, as it limits solar heat gain through windows, keeping living spaces cooler and more comfortable. Additionally, efficient temperature control can lead to significant energy savings, contributing to a more sustainable and eco-friendly building design.

While exterior shades may offer benefits such as reducing sound, enhancing aesthetics, and providing privacy, these are secondary advantages compared to their primary role in managing heat and improving energy efficiency within the building.