{{short description|Window composed of adjustable parallel louvres set in a frame}} {{use dmy dates|date=April 2026}} {{redirect|Louvre window|window louvres|Louver#In architecture}} {{for-multi|the tango song|Jalousie 'Tango Tzigane'|the song by Priscilla|Jalousie (Priscilla song)}} [[File:Jalousie1.jpg|thumb|right|Glass jalousie window and storm door, common in mid-20th-century homes in warm climates]] [[File:GoldeneyeEstate.jpg|thumb|right|Wooden jalousies were chosen in 1946 by [[Ian Fleming]] for his Jamaica estate, [[Goldeneye (estate)|Goldeneye]].]] [[File:Jalousie2.jpg|thumb|right|Glass jalousies viewed from outside]] {{wiktionary|jalousie}}
A '''jalousie window''' ({{IPAc-en|uk|ˈ|dʒ|æ|l|ʊ|z|iː}}, {{IPAc-en|us|ˈ|dʒ|æ|l|ə|s|iː}}), '''louvred window''' (Australia, New Zealand, [[list of islands in the Pacific Ocean|Pacific Islands]], [[Southeast Asia]], United Kingdom), '''jalousie''', '''ventilator''', or '''jalosy'''<ref> {{cite web | url = https://doorwinwindows.com/windows-doors/jalosy-windows-an-elegant-addition-to-your-home | title = Jalosy Windows: An Elegant Addition to Your Home | year = 2022 | publisher = Doorwin | access-date = 2023-12-14 | quote = Jalosy windows, also known as jalousie windows, have a distinct charm that sets them apart from other window types. Originating in French-speaking regions, these windows gained popularity across Europe and the United States during the mid-20th century. }} </ref> is a [[window]] composed of [[parallel]] slats of glass, acrylic, or wood set in a frame. The [[louver|louvres]] are joined onto a track so that they may be tilted open and shut in unison to control [[airflow]], usually by turning a [[crank (mechanism)|crank]].
== Etymology == ''Jalousie'' is the French word for "jealousy". It originated in 18th century France from the Italian word ''geloso'', which means "jealous" or "screen", as in to screen something from view.<ref>{{Cite web|url=https://en.oxforddictionaries.com/definition/jalousie|archive-url=https://web.archive.org/web/20160925021739/https://en.oxforddictionaries.com/definition/jalousie|url-status=dead|archive-date=September 25, 2016|title=jalousie {{!}} Definition of jalousie in English by Oxford Dictionaries|website=Oxford Dictionaries {{!}} English|access-date=2018-12-15}}</ref><ref>{{Cite web|url=https://safetylinejalousie.com.au/the-history-of-jalousie/|title=The History of Jalousie|date=2018-08-29|website=SafetyLine Jalousie|language=en-AU|access-date=2018-08-29}}</ref>
Because of their slatted louvres, jalousie windows protect the interior of the house from jealous, peering eyes (when not made of a transparent material like glass).<ref name="Retro">{{Cite web|url=https://retrorenovation.com/2014/05/12/jalousie-windows-vintage-catalog/|title=Jalousie windows, their history and where to buy them today - 21 photos from 1950|date=2014-05-12|website=Retro Renovation|language=en-US|access-date=2018-12-15}}</ref>
==Design== Joseph W. Walker of [[Malden, Massachusetts]], applied for a US patent for a basic louvered window in 1900. He was issued patent no. 687705 on November 26, 1901.<ref>Walker, Joseph W. [https://pdfpiw.uspto.gov/.piw?docid=00687705&PageNum=1 "Louver-window"] {{Webarchive|url=https://web.archive.org/web/20210725172821/https://pdfpiw.uspto.gov/.piw?docid=00687705&PageNum=1 |date=2021-07-25 }} U.S. patent no. 687,705 (filed: 19 December 1900; issued: 26 November 1901).</ref> A popular hand-cranked glass, aluminum and screen window combination was later designed by American engineer [[Van Ellis Huff]] and found widespread use in temperate climates before the advent of [[air conditioning]].<ref name=Times_obit>{{cite web|work=[[The New York Times]]|title=Van Ellis Huff, Inventor, 93|author=AP|date=December 16, 1987|url=https://query.nytimes.com/gst/fullpage.html?res=9B0DE5DD143CF935A25751C1A961948260}}</ref> Jalousie windows were a popular feature in [[mid-century modern]] houses, especially those built in warm and humid climates.<ref>{{Cite web|url=https://thecraftsmanblog.com/jalousie-jealousy-the-story-of-the-jalousie-window/|title=Jalousie Jealousy: The Story of the Jalousie Window|date=2017-01-23|website=The Craftsman Blog|language=en-US|access-date=2018-12-15}}</ref> [[File:Jalousie full.png|thumb|A jalousie window in the closed and open position]]
==Use== Jalousie windows maximize natural ventilation by allowing airflow through the entire window area. Historically made only of wooden slats or glass panes, they are well suited to mild-winter climates.<ref>{{Cite web|url=https://modernize.com/windows/types/jalousie-windows|title=Jalousie Windows - Replacement Window Costs - 2018 - Modernize|website=modernize.com|access-date=2018-12-15}}</ref> With mass production they became very common throughout homes in mid-20th-century [[Florida]], [[Hawaii]], [[Puerto Rico]], southern [[California]], the [[Deep South]], and Latin America. In cooler regions they were used in [[porch]]es and [[sunroom]]s. They were also widely used in [[mobile home]]s during the 1950s and 1960s before most manufacturers began switching to sliding and [[sash window]]s in subsequent decades.<ref>{{Cite web|url=https://modernize.com/home-ideas/34321/replacing-windows-mobile-home-process-cost|title=Mobile Home Windows - Replacement Costs|date=2017-01-10|website=Modernize|language=en-US|access-date=2018-12-15}}</ref> Modern jalousie windows may be high-performance architectural windows, and some have even been featured in buildings which received awards for excellence in residential design and [[sustainable living]].<ref>{{cite web|url=http://www.breezway.com.au/projectprofiles/|title=Project|website=Breezway|accessdate=31 December 2013}}</ref><ref>{{Cite web|url=https://www.breezway.com.au/project/breeze-solarium-house-excellence-in-sustainable-living/|title=Breeze Solarium House, Excellence in Sustainable Living|date=30 August 2017|language=en-AU|access-date=2018-12-15|archive-date=2018-12-16|archive-url=https://web.archive.org/web/20181216031518/https://www.breezway.com.au/project/breeze-solarium-house-excellence-in-sustainable-living/|url-status=dead}}</ref><ref>{{Cite web|url=https://www.breezway.com.au/project/open-spaced-topical-beachfront-oasis-utilising-breezway-louvres/|title=Open Spaced Topical Beachfront Oasis Utilising Breezway Louvres|date=12 December 2018|language=en-AU|access-date=2018-12-15|archive-date=2018-12-16|archive-url=https://web.archive.org/web/20181216031131/https://www.breezway.com.au/project/open-spaced-topical-beachfront-oasis-utilising-breezway-louvres/|url-status=dead}}</ref> Jalousie windows have evolved over time and these days can be seen as a design element as well as a technical device to use natural ventilation and temperature control. They are also used more widely in commercial projects. <ref>{{cite news |last1=Peter |first1=Alex |title=Timber windows |url=https://www.authentictimberwindows.com/ |access-date=19 December 2021}}</ref>
== Efficacy == A commonly accepted advantage of jalousie windows is their ability to be left part-way open in heavy rains as a way to maintain desirable ventilation, whether during a [[sunshower]] or prolonged [[Tropical cyclone|tropical storm]]. An experiment in 1960 tested the efficacy of jalousie windows in tropical climates to exclude rain while still allowing for air flow.<ref>{{cite journal|last1=Koenigsberger|first1=O.|last2=Millar|first2=J.S.|last3=Costopolous|first3=J.|title=Window and Ventilator Openings in Warm and Humid Climates|date=1960|journal=Ekistics|volume=9|issue=56|pages=417–423|jstor=43617597}}</ref> A major issue with excluding rain while allowing air flow is that both tend to come from the same direction. The angled slatted jalousie windows give the impression of solving this issue, however, the actual efficacy of the windows to let in air while keeping out water was deemed unsatisfactory by the study's authors.
Jalousie windows also have several other drawbacks.<ref>{{cite journal|last1=Polson|first1=Mary Ellen|date=May 2017|title=Postwar Challenges|journal=Old House Journal|page=42}}</ref> Traditional style jalousie windows offer poor overall resistance to water penetration and drafts and are difficult to positively secure, as their slats are easily and silently removed. In addition to the inability to keep out water, they do not provide a secure barrier to keep air conditioned air inside. Also, the metal parts which make up the windows moving mechanism are prone to corrosion in humid environments, leading to damage such as broken or missing cranks. Jalousie windows are objects of scorn for many Floridians, as the windows are unable to keep out human and insect home invaders.<ref>{{Cite web|url=https://www.chicagotribune.com/news/ct-xpm-1988-01-14-8803220178-story.html|title=ONLY BURGLARS AND BUGS YEARN FOR THE JALOUSIE|last=Sentinel|first=Kathleen Parker, Orlando|website=chicagotribune.com|date=14 January 1988 |language=en-US|access-date=2018-12-15}}</ref> <ref>{{cite news |last1=Anton |first1=Alex |title=Rm Window Tint |url=https://www.rmwindowtint.com/ |access-date=12 February 2023}}</ref> Modern manufacturers have improved their designs of jalousie windows to address these problems. Many market their products as having greater security and energy efficiency compared to earlier versions.<ref>{{Cite web|url=http://coastalwindows.com/windows/jalousie/|title=Jalousie|website=coastalwindows.com|access-date=2018-12-15}}</ref>
== Mid-century modern advertising == [[File:Jalousie knob.png|thumb|The crank of a jalousie window in the closed and open position]] [[File:Jalousie slats.png|thumb|The louvres of a jalousie window in the closed and open position]] Many companies manufactured jalousie windows during the 20th century, and there are multiple surviving examples of advertisements from this period which demonstrate how the windows were marketed to consumers.<ref name="Retro"/> The advertisements tended to stress how jalousie windows provide ventilation, privacy, rain-proofing, and an extra room in winter. Companies like StormMaster claimed their jalousies provided "winter warmth and summer comfort".<ref name="Retro"/> Others, like Ludman WindoTite, promoted their product by declaring how the brand's windows have "transformed the Jones' front porch", which is a reference to the concept of [[keeping up with the Joneses]].<ref name="Retro"/> The VentVue company took a different approach to their advertising copy, instead stressing how their jalousies make "every window a picture window", and states that they are fashionable choice for new constructions and replacements.<ref name="Retro"/>
== See also == *[[Louver]] *[[Window blind]]
== References == <references />
{{DEFAULTSORT:Jalousie Window}} [[Category:Windows]] [[Category:Architecture in Barbados]]