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Louver

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Louver (PSF)
Inside a single louvered stevenson screen
Drayton green sch

louvered cupola bell house

For the French museum, see the Louvre

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.

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, plastic 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]

Louvers are rarely seen as primary design elements in the language of modern architecture, but rather simply a technical device. However, there are examples of architects who use them as part of the overall aesthetic effect of their buildings. The most well-known example is Finnish modernist architect Alvar Aalto who would create aesthetic effects in the facades of his buildings through the combination of different types and sizes of louvers, some fixed some moveable, and made mostly from wood (e.g. the various buildings of the Helsinki University of Technology). A second example, taking influence from Aalto, is the second-generation modernist architect Juha Leiviskä.

Additionally, louvers are used as semi-passive means of thermal control on spacecraft. They are also available as an accessory for some automobiles.

See alsoEdit

NotesEdit

  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

ReferencesEdit

  • 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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br:Persianenn eo:Persieno fr:Persienne it:Persiana (architettura) ja:ルーバー simple:Louver

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