Louver window is a window blind or shutter with horizontal slats that are angled to admit light and air, but to keep out rain, direct sunshine and noise. The angle of the slats may be adjustable, usually in blinds and windows, or fixed. Modern louvers are often made of aluminium, metal or glass. They maybe opened and closed with a metal lever, pulleys, or through motorized operators.

Some modern louver systems serve to improve indoor day lighting. Fixed mirrored louver systems can limit glare and of redirect diffuse light. Such louvers may be integrated in between two panes of double glazing.

Aluminum profiles are the best material of the framework, they have the excellent processing and mechanical performance, and a wide variety of color choices (powder coat, PVDF coat, anodize and wood) that adapt to variety of decoration styles and long-lasting colors against all weather conditions.