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A kitchen hood in a small apartment. A kitchen hood, exhaust hood, hood fan, extractor hood, or range hood is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen. It removes airborne grease, combustion products, fumes, smoke, heat, and steam from the air by evacuation of the air and filtration. [1]
Modern louvers are often made of aluminum, metal, wood, or glass.They may be opened and closed with a metal lever, pulleys, or through motorized operators. [3]The Australian Standard specifies requirements for the construction of buildings using louver in bushfire-prone areas in order to improve their resistance to bushfire attack from burning embers, radiant heat, flame contact and ...
Kitchen ventilation is the branch of ventilation specialising in the treatment of air from kitchens. [1] It addresses the problems of grease, smoke and odours not found in most other ventilation systems. Restaurant kitchens often use large extractor hoods. Kitchen ventilation equipment includes an extractor hood or canopy, and a filtering ...
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]
Natural ventilation is the intentional passive flow of outdoor air into a building through planned openings (such as louvers, doors, and windows). Natural ventilation does not require mechanical systems to move outdoor air. Instead, it relies entirely on passive physical phenomena, such as wind pressure, or the stack effect. Natural ventilation ...
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