There's two main ranges of array hoods - the duct range hood or the ventless or ductless array hood. The primary difference in between the two is the final area for toxins. With the ducted hood selection pollutants are expunged via the air duct and also out into the open air, although with a ventless hood the impurities are recorded inside the ductless filter utilizing the cleansed air recirculated back in your kitchen area.
The even more sophisticated array hood models also supply a feature that maintains the hood running on a 10-15 min timer after you're done cooking, in order to cleanse the last traces of odor as well as then silently turn off.
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.