Extreme pure details, simple fashion lines. the frame and the fan are flush inside and outside, with smooth and smooth appearance. The frame and the fan adopt die casting expansion glue corner code connection process, safe and firm, which is a hardest core guardian. All heat insulation strips and isobaric strips are designed on the same isotherm to achieve high efficient energy saving. Three sealing design of the system, multi-cavity structure, a full set of standard imported hardware system, A full set of standard imported hardware system, equipped with no base handle, hidden hinge, high bearing capacity, easy to open and close. The new zinc alloy material floor drain drainage system can easily deal with the large number of drainage needs caused by the wind and rain, and solve the problem of water overflow due to too small discharge, and at the same time, using the principles of aerodynamics and adopting equal pressure inlet hole design to prevent rainwater backflow. Standard 5 + 19A + 5 double-layer hollow warm edge strip tempered glass, and at the same time, three glasses and two chambers can also be selected, so that the soundproof effect reached more than 35 db. Can be configured with floor window glass guardrail, both ventilation and safety, to achieve "big open", "big transparent", "big vision space".