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.
Whether the kitchen design calls for a big angular "pro-style" hood, or a smooth Italian charm with rounded glass, or a timeless hood with wood trim, there is a perfect layout out there to match any kind of kitchen.
Then expos are an excellent choice, if you want the newest in style and design and also look at all the latest devices. To acquire a hood in this manner though can be rather costly however it is a good way to obtain a taste of the latest layouts as well as take them to a workshop to be hand made or to search online for something similar but a whole lot cheaper.