Delfield sandwich/salad prep refrigerators are commercial kitchen appliances designed to combine ingredient storage and food assembly. They feature a refrigerated rail on top to hold food pans with fresh ingredients, a cutting board for preparation, and a refrigerated base for larger storage. Key features often include a front-breathing, rear-mounted refrigeration system with environmentally friendly R290 refrigerant for efficiency, durable stainless steel construction, and mobile casters.   Key features. Efficient refrigeration: A front-breathing, rear-mounted system that allows for flush installation against walls or other equipment.  Uses environmentally friendly R290 hydrocarbon refrigerant to maintain cool, consistent temperatures (typically 33-41°F).  High-density foam insulation helps with temperature retention.  Convenient prep area: A stainless steel top with a built-in polyethylene cutting board for food assembly.  A refrigerated rail on the top holds a specified number of food pans (e.g., 1/6 size) for easy access to ingredients. Storage: A refrigerated base section with doors or drawers to store jugs, jars, and backup ingredients.  Features adjustable shelves for flexible storage options.