An insulated glass unit (20) is described and includes at least first and second glass pane (22, 32) and an optional third glass pane (42). Any one or more of the glass panes (22, 32, 42) may have a thickness of less than or equal to about 0.7 mm. In some instances, any one or more of the glass panes may form part of an electronic display. The insulated glass unit (20) has a lower mass and an improved thermal performance compared to a conventional triple pane insulated glass unit, and is particularly suited for use in a display cooler door.