As the name suggests, a combi oven or combi steamer is a three-in-one oven which allows you to cook with steam, hot air (convection) or a combination of both. As an alternative to using a separate steamer or convection oven, a combi oven can be used to replace both appliances – saving time, space and money but more importantly providing commercial kitchens with a cooking appliance that can practically cook any type of food.