First, the inside-opening and inside-inverted window is a door and window system that can be opened indoors and hung with window sash for ventilation. It is widely used in Europe, which is different from American windows and external windows.

Second, the inward-opening and inward-tilting window is to operate the handle of the window sash to drive the hardware driver to move accordingly, so that the window sash can be opened horizontally or tilted indoors to open a certain angle for ventilation.

Third, 1. Ventilation. Because the inverted position is another way to open the casement window, the room is naturally circulated with the natural air, and the indoor air is fresh, and the possibility of rainwater entering the room is ruled out. The fresh air undoubtedly creates a comfortable living environment for people.

2. Security. The linkage hardware arranged around the window sash and the various functions of holding hands for indoor operation are fixed on the window frame when the window sash is closed, so the safety and anti-theft performance are excellent.

3. Easy to clean windows. Simple operation of the linkage handle can make the outside of the window sash turn indoors. So that it is convenient and safe to clean the outer surface of the window.

4. practicality. It avoids occupying indoor space when the inner window is opened, and it is inconvenient to hang curtains and install lifting clothes hangers.

5. Good sealing and heat preservation performance. Through multi-point locking around the window sash, the sealing and thermal insulation effects of doors and windows are ensured.

Windows not only let light and air into the room, but also play a communication role. The first thing people see is a frame with glass. However, the window itself contains many technologies. After countless times of opening and closing, the true meaning of the window is revealed.

By replacing the hardware, the ordinary inner window is upgraded to a European-style inner window, which is convenient to open and easy to use. Especially, the function of inner window is ventilation and wind resistance, which saves indoor space, is convenient to hang curtains, and can well extend the service life of hardware.

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