Rational AG is a German manufacturer and was founded by Siegfried Meister in 1973. The company develops and produces cooking appliances suitable (Combi steamers and oven) for cooking from 30 meals a day in large and commercial kitchens. The company is based in Landsberg am Lech, Germany. The company owns the subsidiary Frima which is based in Wittenheim/France. Since its establishment, RATIONAL AG has grown from 18 to 1,500 employees worldwide.