Maximum Heat Is Delivered By The Upper-Tier Burner For More Rapid Boils And Hotter Sears. The Low Flame On The Lower Tier Burner Eliminates The Need For A Double Boiler Completely. And Keeps Even Delicate Sauces Warm Without Fear Of Scorching Or Separating. The Lower Tier Of The Wolf Dual-Stacked Burner Lets You Enjoy A Range Of Almost Unheard Of Precision Control. Melt Fine Chocolate Without Separation. Reduce Sauces Without Scorching. Or Keep Soups At An Ideal Gentle Bubble For Hours. Maintain Control With Dual-Stacked BurnersMaintain Control With Dual-Stacked Burners That Go From 12.000 Btu Down To A Mere Breath Of Flame Simmer And Melt SaucesSimmer And Melt Sauces. Soups. And Marinades Easily With The Lower Tier Of The Dual-Stacked Burner Pair This Slim 15Pair This Slim 15 Reignites Flame AutomaticallyReignites Flame Automatically With Spark Ignition System Cleanup Is A Snap - Burner PansCleanup Is A Snap As Sealed. Seamless Burner Pans Contain Sloshes And Spills Select Stylish Stainless KnobsSelect Stylish Stainless Control Knobs Capped In Black Move Pots And Pans - Cast IronMove Pots And Pans Effortlessly Across The Continuous Cast-Iron Grates Cooktop Specifications(Ul)(Li)Dual Stacked Sealed Burners(/Li)(Li)Flame Recognition And Automatic Reignition(/Li)(Li)1 - 9.200 Btu Burner(/Li)(Li)1 - 12.000 Btu Burner(/Li)(/Ul)