As of 2015, there are at least four distinct types of range hoods that can be used in a kitchen setting. These types are under cabinet mount, wall mount, ceiling or island mount and a downdraft ventilation system.
Each type of range hood, except for a downdraft ventilation system, is placed above a cooking range and is used to suck in smells, condensation and heat that results from cooking. The downdraft ventilation system serves the same function, but instead draws fumes generated from cooking down towards the floor or a basement before being sent out. Range hoods placed above the cooking area typically use a remote blower and send heat and cooking smells out, reducing grease and smell in the kitchen.