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 outer circulation double-layer is a double-layer curtain wall where the air inlet and outlet are set on the outer curtain wall, and the outdoor air enters the heat channel between the two-layer curtain wall and flows in an orderly manner through the reasonable configuration of the air inlet and outlet. In winter, the intake and exhaust vents are closed, and the temperature of the air in the hot aisle due to the increase in sunlight is equivalent to increasing the temperature of the outer surface of the inner curtain wall and reducing the indoor heat loss. In summer, open the intake and exhaust vents. The heat is discharged to the outside during the movement of the air flow in the hot aisle, which reduces the temperature of the outer surface of the inner curtain wall, weakens the transmission of outdoor heat to the interior, thereby reducing the load on the air conditioner and saving energy.