Brise soleil, sometimes called brise-soleil- in architecture refers to a variety of permanent sun-shading structures, ranging from simple patterned concrete walls to elaborate wing-like mechanism.
In the typical form, a horizontal projection extends from the sun side facade of a building. This is most commonly used to prevent facades with a large amount of glass from overheating during the summer. Often louvers are incorporated into the shade to prevent the high-angle summer sun falling on the facade, but also to allow the low-angle winter sun to provide some passive solar heating.
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