Jan 14, 2019 · Downdraft ranges have built-in vents between the burners, and suck smoke and steam through an exhaust pipe or filtration system. That means they don't need an external vent hood—a trait that makes them popular in open kitchens, and kitchens with cathedral ceilings. The new KSDG950ESS (MSRP $3,150) 30-inch dual-fuel range and KSEG950ESS (MSRP $2,790) 30-inch electric range are among the very few downdraft ranges on the market.