They are also used more widely in commercial projects.Ī 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 a sunshower or prolonged tropical storm. Jalousie windows have evolved over time and these days can be seen as a design element as well as a technical device to utilize natural ventilation and temperature control. 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. They were also widely used in mobile homes during the 1950s and 1960s before most manufacturers began switching to sliding and sash windows in subsequent decades. In cooler regions they were used in porches and sunrooms. With mass production they became very common throughout homes in mid-20th-century Florida, Hawaii, southern California, the Deep South, and Latin America. Historically made only of wooden slats or glass panes, they are well suited to mild-winter climates. Jalousie windows maximize natural ventilation by allowing airflow through the entire window area. Ī jalousie window in the closed and open position Use Jalousie windows were a popular feature in mid-century modern houses, especially those built in warm and humid climates. 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. Walker of Malden, Massachusetts applied for a US patent for a basic louvered window in 1900. However, the origin of jalousie dates from the mid-18th century, derived from the French word jealousy, 'permitting one to see without being seen'.

Supposedly because of their slatted louvres, jalousie windows protect the interior of the house from jealous, peering eyes.

It originated in 18th century France from the Italian word geloso, which means 'jealous' or 'screen', as in to screen something from view. Jalousie is the French word for 'jealousy'.

Replacement jalousie window panes