Professional grade construction and performance, exclusive to Thermador are their patented Star Burners. The exclusive, sealed 3-in-1 Star Burner's unique five-point design offers a reduced cold spot, faster time to boil and the ExtraLow feature. The coverage area allows for more ports and more flame distribution than a round burner. The ExtraLow feature is perfect for simmering sauces or delicate confections. It cycles on and off to maintain temperatures as low as 100°F; another exclusive trait of Thermador's excellent cooking appliances. Thermador burners are capable of boosting up from the ExtraLow setting to a powerful 18,000-BTU level which is great for boiling. And if that's not enough, these burners reach boiling point point over 50% faster than leading competitors.