The hot, moist, greasy effluent stream created by food preparation is sucked in and also tired outside, rather than letting it blow right in your face. Any type of cook that spends a significant quantity of time in the kitchen environment will attest to the difference between food preparation in comfort, and needing to sustain a steam bath for several hrs.
If you are making use of a gas oven in your home kitchen, it is rather advised making use the custom copper hoods in order to make certain that deadly gases like carbon monoxide gas and nitrogen dioxide are removed from your kitchen as successfully as possible.
Range hoods fix this issue by eliminating the polluted air to the outside (ducted installation) or cleansing it with a series of filters (ductless/ recirculating setup). Besides the obvious benefit of maintaining the kitchen air odorless, array hoods supply numerous other, much more subtle, benefits.