The breathable dynamic double-layer curtain wall （also called thermal dual-channel curtain wall） is an energy-saving and environmentally-friendly curtain wall. According to the principle of ventilation, it is divided into two systems of natural ventilation and forced ventilation, namely the outer circulation double-layer curtain wall system and the inner circulation double-layer curtain wall system.

　　Fundamental:

　　The inner circulation double-layer curtain wall is an active energy-saving and environmental-friendly glass curtain wall. The basic principle is to design a double-glazed space to form the greenhouse effect. Then, in different ways, the hot air in the greenhouse is excluded from the outdoors in summer. The solar thermal energy is introduced into the room in a controlled manner, so that the entire building can save a lot of energy during the hot and cold seasons. In addition, ordinary or intelligent shading systems can be added to prevent strong ultraviolet rays and strong heat radiation in summer, and further improve the thermal insulation performance of double-layer curtain walls in summer.

　　Structure and performance characteristics:

　　1: Basic structure: It consists of an outer closed curtain wall and an inner curtain wall with air inlet and outlet seals. The inner and outer curtain walls act on the same structural system （frame system or unit system）, and the middle air layer can be provided with a sunshade. Louver.

　　2. It has excellent thermal insulation performance. The average heat transfer coefficient K can reach 0.96W / m2K.

　　3. Good sound insulation performance, weighted sound insulation volume RW> 45dB, giving users a quiet and serene living and working environment.

　　4. The curtain wall system often needs to cooperate with professional mechanical ventilation to provide fresh air and achieve energy recovery. The specific flow rate is determined according to different places of use, and the maximum flow rate can reach 100m3 / h.

　　5. With the shading louvers, the indoor light can be freely adjusted, and the comfort of the indoor environment is easy to control.

　　6: Sash channels for natural air to enter the room can be added as needed to directly introduce fresh outdoor air to improve indoor air quality.