If you already have an existing hood in your kitchen, you could probably look at the manual supplied by the manufacturer or download a manual from the manufacturer’s website. The manual will be able to tell you whether your range hood is ventless or vented. If you do not have a manual, you will have to figure out whether your hood has a ducted system that goes into the ceiling and out the house. If this is the case, you then have a vent hood. Ventless hoods extract the cooling air through a series of internal filters, which then cleans the air and blows it back into the kitchen.
