Wenger window system is characterized by energy saving. It has been tested by European CE test and domestic professional testing center many times. Many performances have reached high standards. It is an ideal partner for energy-saving buildings. Its appearance is modern and concise, the profile adopts European U-slot design, which can be matched with various brands of hardware; the opening methods include fixed type, internal flat opening, internal inversion, internal opening and internal inversion, combined type, etc.; can be installed with a variety of automatic control devices In order to cooperate with the intelligent building system.