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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]
Energy costs for a typical hood can range from $4,600/year in Los Angeles to $9,300/year in Singapore based on differences in cooling needs. [30] The bulk of the energy that fume hoods are responsible for is the energy needed to heat and/or cool air delivered to the lab space.
The Range-R is a hand-held radar device manufactured by L-3 Communications capable of detecting motion through solid walls. The device operates as a finely tuned motion detector, using radio waves to detect the presence of people and movements as small as human breathing at a distance of 50 feet or more.
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