Since inventing the Combi-Steamer oven over forty years ago, RATIONAL has been driven by the ambition to supply all the chefs in the world with the most effective tools for hot food preparation. In following this aim, RATIONAL has focused on developing solutions that mix potency and simplicity, support creative thinking and selection and guarantee constant high It’s why the company has – and can still have – the number one selling industrial combi oven on the market worldwide.