Affectionately termed "combi ovens" are designed to provide the ultimate variety in a kitchen. Most of them come with 3 cooking modes- steam, hot air, and combination. Steam mode keeps flavors and colors in foods. Hot air mode uses circulated air to cook in a manner similar to convection ovens. Combination mode, the key to a combi oven, uses both steam and hot air to cook foods perfectly even at almost twice the speed.