Range hoods are a necessity in any kitchen. A properly installed range hood will vent hot air and cooking odors outside as well as help keep kitchen surfaces free of grease. The trickiest part of installing a range hood is determining how to run the ventilation ducts. You will need to decide if it is easier to vent through an outside wall or up through the roof. See the tutorial, "Installing a Range Hood – Roof Vent," if that option is better for you.