Terracotta’s outstanding energy saving performance helps achieve increasing level of energy performance to reduce environmental impacts associated with excessive energy use.  There are three reasons-First, Terracotta’s heat conductivity is 0.4 watt per meter per degree, much lower compared with Aluminum’s 237 w per meter per degree. These characterisics of terracotta help reduce the heat conduction through building wall.Second, terracotta has double skins with hollow structure which reduces the heat convection through the wall;Third, terracotta facade system is open system. The natural ventilation of open system contributes to the less heat transfer by convection and radiation.Moreover, Terracotta is radioactivity free, contains no heavy metal and 100% recyclable.