Aluminum-fixed windows cannot be opened. Generally, there is no window sash, and only the glass can be fixed on the window frame. Sometimes to produce the same facade effect as other windows, sashes are also installed, but the sashes are fixed on the window frame. Aluminum-fixed windows are only used for lighting and viewing purposes. Aluminum fixed windows are usually used on occasions where only lighting is considered but ventilation is not considered. As the aluminum fixed window sash is fixed, the glass area can be slightly larger. They can be almost any shape, including square, rectangle, arch, circle, triangle, or a combination of these options.
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