Chilled storage means that the goods to be stored are required to be refrigerated below 8° C. Generally, this will cover food items such as read to eat sandwiches, chilled rather than frozen ready meals, foods that have a use-by date such as dairy products, fresh meats and any other item that must be refrigerated. A frozen storage refrigerator, also known as freezer, is an equipment to store products at a temperature below 0° C. In this type of freezer, various processes that are aimed at maintaining the quality of the food, pharmaceutical and other products are executed.