What are ramge hoods? A range hood is a device used to ventilate the air inside of residential and commercial kitchens. Before modern times, kitchens were housed separately from residential homes. Additionally, holes were created in the ceiling above the cooking surface to ventilate the room. Today, with the installation of kitchen range hoods, we have kitchens that have become the heart of the home. Thanks to ramge hoods, our homes can include enclosed kitchens and kitchens that are attached to other rooms in a house. While cooking, remember to turn on your kitchen range hood, so indoor air pollution does not build up in your home.