Abstract: A temperature-controlled enclosure for displaying cold items. The enclosure includes a body having a front opening and defining an interior space. A frame assembly is coupled in the front opening. One or more doors are coupled to the frame assembly. At least one of the doors includes one or more window panels, a housing assembly that holds the window panels, and a gasket. A ridge projects from the rear surface of the housing assembly between the gasket and the interior space of the enclosure. The ridge extends across a portion of an air gap between the rear surface of the housing assembly and a front surface of the frame assembly.