I regret it after installing the inner window. I regret it for the following reasons:
1. It is not safe to open the inner window for a long time. Although the inner window is opened to remove the design features that occupy the space, if the window is opened for a long time, the service life of the window will be greatly reduced. Its design is not like the inner window, the focus of the whole window is pressed on the hardware accessories below, and long-term operation will reduce the use. The cost of secondary maintenance is relatively expensive.
2. The price of the inner window is relatively expensive in the market, and there is not much practicability at the same time. Especially in some places where light and ventilation are needed, there is no way to open more, and the light and ventilation effects are poor.
3. The curtain cannot be installed when the inner window is opened. Due to the inverted state in the window, there is a gap of more than ten centimeters between the upper part of Casement and the window frame. There is no way to install curtains.
4. When the inside window is open, it affects the aesthetic effect of the whole room very much.
