Can UPVC casement windows be designed to be hung upside down?

UPVC casement windows are usually not designed as hanging windows because the structure of casement windows is based on hinge design, and the window sash is usually connected to the window frame through a hinge on one side and opens outward (or inward). Hanging windows usually belong to another type of window, such as hanging windows or sliding windows, which are opened and closed by sliding or hanging the window sash in the vertical direction. Although their functions overlap, their structures and opening methods are different.
However, in reality, some customized UPVC windows can combine the characteristics of different types of windows to some extent. For example, some designs may allow for independent opening and closing of the upper and lower parts of the window. In such designs, the window sash may be adjusted through hinges at the top or bottom, or combined with a dual sliding system for opening and closing. This design can provide more flexible ventilation methods, especially in situations where space is limited or there are specific needs.
However, standard UPVC casement windows mainly focus on a single horizontal opening and closing method, while hanging windows are more suitable for vertical opening, so the design concepts of the two are different. If you need the function of opening windows up and down, you may need to consider other window types or customize the design.