A special exhaust hood with an
enclosed work surface used for biological testing and experiments.
Biosafety cabinets protect experiments from contaminants in the
surrounding room, and they protect workers from hazardous materials
being used in the cabinet. They also include features that prevent cross
contamination within the cabinet. Conventional fume hoods afford
protection only for the room environment. Biosafety cabinet ventilation
systems provide a flow of air from the room and through the fume hood
face opening as well as HEPA filtering of exhaust and recirculating air.
Reference National Sanitation Foundation (NSF) Standard Number 49. See
also Fume Hood.
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