Burner Basics: Continued
The vast majority of ranges offer sealed burners, which means the entire range top allows no place for spills or grease to drip down into the stove. As a result, jets are positioned so that the gas flows out to the side, then up, slightly reducing efficiency but making cleanup a relatively painless task.
In this setup (like the BlueStar burner, left), gas jets shoot straight up from a burner that's suspended over an opening, drawing in lots of oxygen to fuel the flames. Pots and pans heat fast and evenly, but spills collect in a drip pan beneath the burner that must be removed for cleaning.