Fume Cupboards
Fume Hood and chambers are mostly found in Hospitals, Hotels or school laboratories. They aid in expelling rather poisonous and unwanted fumes to the outside leaving the room conducive. In a recirculating system, filters may be used to remove odors in addition to the grease.
Kitchen Hood Units
Commercial vent hoods are specialized and combined with a fresh air fan that draws in exterior air, circulating it with the cooking fumes, which is then drawn out by the hood. In most exhaust hoods, a filtration system removes grease (the grease trap) and other particles. They exhaust air to the outside, as well as recirculate the air to the kitchen giving an excellent working environment.