What is the difference between chest freezer and deep freezer?

The term deep freezer refers to a type of freezer that has extra insultation for longer-term storage than your typical refrigerator freezer. Deep freezers typically come as upright or chest freezers. A chest freezer is a type of deep freezer that opens like a chest. Most chest freezers are rectangular, although some compact models are cube-shaped. Chest freezers range from 10 to 25 cubic feet.