Thermodyne's Patented cooking, rethermalizing and holding system is the result of decades of research and technology. All Thermodyne ovens are built to take the demands of today's modern commercial kitchens. All cabinets are made with heavy stainless steel both inside and out for corrosion resistance and easy clean up. Glass doors allow viewing of product without disturbing the cooking process. Heat transfer plates are made of anodized aluminum for strength as well as ease of cleaning. From their top mounted solid-state controls to their sturdy steel casters, Thermodyne ovens are built to take the heat and keep your business cooking. The Fluid Shelf system keeps the heat source in constant motion, allowing every square inch of surface to provide the same result. As compared to conventional models requiring perimeter heat sources or fans, Thermodyne units achieve more consistent and higher quality results making Thermodyne the most efficient hot food holding cabinet. Even heat transfer from the shelf to the food makes food safety compliance a sure thing. Even with continuous door openings, food in a Thermodyne unit experiences little or no decrease in temperature because heat remains active in the shelf.