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The fume hood is, at its most basic, a box where the lab personnel can temporarily store chemicals and other substances. They are able to work within the box. They are generally quite large, but the size can vary. They are usually available in different widths (1000mm, 1200mm, 1500mm, 1800mm, and 2000mm). The depth can vary as well. It is generally between 700mm and 900mm.
How fume hoods work
Both the re-circulating and ducted options work very similarly. They take in air from the outside. They then filter the air and expel it once it is safe. The difference is where that air goes. In the ducted hood, they expel the air out of the room and out of the building via ducts. The re-circulating fume hood is relatively new, and this actually filters the air so that it can go right back into the laboratory.
About fume hoods
A fume hood in the laboratory is one of the most essential safety items you can have. Another term for these items is fume hoods. They have five sides in the work area, and they allow for a limited amount of ventilation. When you are working with chemicals and fumes, which are toxic, this is very important. The same is true when you are working with elements that give off vapor or dust. It keeps those using the unit, and the others in the lab setting, safe. You will find two different basic types of fume hoods – ducted and re-circulating.