A fixed window is generally a window that cannot be opened by inserting the glass directly on the window frame or fixing the sash on the window frame. Only for lighting and viewing. It is usually used for daylighting windows in some parts of sidewalks, stairwells and ordinary windows.

Features: Cannot be opened

Purpose: daylighting, overlooking

Common locations: walkways, lighting windows in stairwells, etc.

Advantages: energy saving

Disadvantages: unable to ventilate or ventilate