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A louver (American English) or louvre (Commonwealth English; see spelling differences) is a window blind or shutter with horizontal slats that are angled to admit light and air, but to keep out rain and direct sunshine. The angle of the slats may be adjustable, usually in blinds and windows, or fixed.
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. [5] 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. [6]
Grilles sometimes have louvers which allow the flow of air to be directed. A register differs from a grille in that a damper is included. [1] [2] However, in practice, the terms grille, register, and return are often used interchangeably, and care must be taken to determine the meaning of the term used. [2] [3]
Steel reinforcement for a foundation wall opening. This shop drawing will require the builder and mechanical engineer to specify the opening size for an air-intake and exhaust louvers to be placed in the concrete openings.
It also serves as a guide to understanding the various types of louvers available and includes items to be considered to ensure their proper use. AMCA Publication 502 - Damper Application Manual for Heating, Ventilating, and Air Conditioning is a guide to understanding the various types of dampers available and items to be considered for their ...
traditional Colonial style & plantation shutters with larger louver sizes; Window shades, including: Roman shades; Roller shades; Pleated shades; Sheer shades; Cellular shades; Solar screens; Various types of boarding, nailed or screwed to the window casing, can be used as temporary window covering.
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