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Fume hoods were introduced about 100 years ago to safeguard personnel working with hazardous materials. While many changes and improvements have been made, the basic concept and design of fume hoods remains the same. Air is drawn from the workplace, around the worker and into the front of the hood, and is then exhausted out of the laboratory.
They are included in preparedness kits, after the September 11 attacks. [7] [8] Preparedness lists, such as those presented by Ready.Gov, often recommend smoke hoods, although some lists use alternate names such as "fume hoods," "respirator hoods," or "self-rescue hoods." As most modern construction contains materials that produce toxic smoke ...
The most basic design of a CAV fume hood only has one opening through which air can pass—the sash opening. [5] Closing the sash on a non-bypass CAV hood will increase face velocity (inflow velocity or "pull"), [a] which is a function of the total volume divided by the area of the sash opening. Thus, the hood's performance (from a safety ...
Fume hood Glove box A biosafety cabinet ( BSC )—also called a biological safety cabinet or microbiological safety cabinet —is an enclosed, ventilated laboratory workspace for safely working with materials contaminated with (or potentially contaminated with) pathogens requiring a defined biosafety level .
Despite their similar appearance, a laminar flow cabinet should not to be confused with a fume hood. A laminar flow cabinet blows unfiltered exhaust air towards the worker and is not safe for work with pathogenic agents, [ 2 ] : 13 [ 3 ] while a fume hood maintains negative pressure with constant exhaust to protect the user, but does not ...
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]
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