Alto-Shaam’s original Cook & Hold oven pioneered the industry in the 1960s – and remains an award-winning kitchen workhorse. Halo Heat® technology, provided by unique thermal cabling, is the heart of the Cook & Hold. The oven cavity is surrounded with gentle, precise heat to evenly cook your food. No fans. No forced air. No added humidity. Alto-Shaam Cook & Hold ovens offer the greatest moisture retention and most even cooking.