The need for ventilation has been apparent from early days of chemical research and education. Some early approaches to the problem were adaptations of the … See more

Most fume hoods for industrial purposes are ducted. A large variety of ducted fume hoods exist. In most designs, conditioned (i.e. heated or cooled) air is drawn from the lab space into the fume hood and then dispersed via ducts into the outside atmosphere. See more

Downflow
Downflow fume hoods, also called downflow workstations, are fume hoods designed to protect the user and the environment from hazardous vapors generated on the work surface. A downward air flow … See more

A fume hood is typically a large piece of equipment enclosing six sides of a work area (including a movable sash window or door), the bottom of which is most commonly located at a standing work height (at least 28 to 34 inches (71 to 86 cm) above the … See more

Ductless fume hoods, also known as recirculating or self-contained hoods, are units that do not extract air out of the building or work environment. Rather, air is sucked through … See more

Because fume hoods constantly remove large volumes of conditioned (heated or cooled) air from lab spaces, they are responsible for the … See more

Fume hoods are typically constructed with a superstructure encasing the various supporting members and inner lining of the hood. This superstructure is often built out of sheet metal, which has apertures punched into it to allow for access to plumbing and … See more