Wolf introduced a new line of induction cooktops in September 2014, though this still-exceptional earlier model is available from your local Sub-Zero and Wolf dealer for a limited time. Learn more . Induction cooking has been used in Europe for decades by professionals and homeowners demanding the best in performance. They are 90-95% energy efficient; as a result, no heat is wasted because energy is supplied directly to the cooking vessel. With Wolf's unframed induction cooktops there's no stainless steel trim, just the sophisticated, minimalist exterior subtly patterned design to hide any unsightly scratches.