A refrigerated display case includes a frame, a door, and a lateral flow barrier. The frame includes a first mullion and a second mullion. The frame defines a common refrigerated zone. The door is hingedly mounted to the first mullion. The door is configured to selectively interface with the second mullion. The lateral flow barrier is coupled to one of the first mullion and the second mullion. The lateral flow barrier extends into the common refrigerated zone. The lateral flow barrier partially separates the common refrigerated zone into an first sub-compartment proximate the door and bounded by the lateral flow barrier and an second sub-compartment opposite the first sub-compartment. The lateral flow barrier is not thermally insulating.