Answer:
The benefits of having a downdraft cooktop are that there is nothing above the stove, as in a range hood stove. This lets you have more headroom, and there is less noise when you turn on the downdraft cooktop. The other benefit is having the fumes go into the floor into a special place, rather than having the fumes rise into your face, and out into the kitchen as you are cooking. Most fumes from foods you are cooking you want to whisk them away as soon as possible since they can have an awful smell.