The Rational website has a dealer locator where customers can enter their locations to see a list of nearby dealers. Used and new Rational ovens are available at eBay.com as of 2015, and the WebstaurantStore website sells new Rational ovens.
Rational's CombiMaster Plus and SelfCookingCenter commercial ovens have stainless steel finishes and cook with steam, convection or both. They are available in several sizes and configurations. The CombiMaster Plus has a USB port that a cook can use to upload up to 50 cooking programs. The SelfCookingCenter can cook different types of food simultaneously. It also monitors staining inside the oven and recommends custom cleaning cycles. Both models offer simplified controls.