Louver.html



For the French museum, see the Louvre

The windows on this storefront feature wooden louvers.

A louver (American English) or louvre (British English), from the French l'ouvert; "the open one") is a window, blind or shutter with horizontal or, less often, vertical 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, usual in blinds and windows, or fixed. As building management services has improved and technology has quickly changed, these louvers have been automated to save on overall cost while providing a pleasant living environment inside buildings.

Louvers originated in the Middle Ages as lantern-like constructions in wood that were fitted on top of roof holes in large kitchens to allow ventilation while keeping out rain and snow. They were originally rather crude constructions consisting merely of a barrel. Later they evolved into more elaborate designs made of pottery, taking the shape of faces where the smoke and steam from cooking would pour out through the eyes and mouth, or into constructions that were more like modern louvers, with slats that could be opened or closed by pulling on a string.¹

More modern louver windows comprise slats of glass, opened and closed with a metal lever, or they may be shutters of wood or other material.

Some modern louver systems serve to improve indoor daylighting. Fixed mirrored louver systems can limit glare and of redirect diffuse light. Such louvers may be integrated in between two panes of double glazing.²

See also

• Jalousie window
• Window shutter

Notes

1. ^ Henisch (1976), pp. 96–97.
2. ^ Dariusz Heim and Kamil Kieszkowski: Shading Devices Designed to Achieve the Desired Quality of Internal Daylight Environment, PLEA2006 - The 23rd Conference on Passive and Low Energy Architecture, Geneva, Switzerland, 6-8 September 2006

References

• Henisch, Bridget Ann Fast and Feast: Food in Medieval Society. The Pennsylvania State Press, University Park. 1976. ISBN 0-271-01230-7

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