Caldera 36 Inch Five Burner Propane Gas Cooktop: With the most powerful residential burner in America at 18,000 BTU, a 150F simmer, full surface grates, electronic ignition & re-ignition, and intuitive controls this gas cooktop has integrated all of the most advanced performance features required by people who love to cook. It s all here. These Caldera cooktops also feature performance styling with a 304 stainless top, sealed burners, and cast stainless knobs.