An insulating glass unit suitable for a refrigeration unit is presented. The insulating glass unit includes a first pane, a second pane spaced at a distance from the first pane, a peripheral spacer frame between the first pane and the second pane, and an inner interpane space. According to one aspect, the spacer frame includes four hollow-profile polymeric spacers, which are secured between the first pane and the second pane along one of the four sides of the insulating glass. According to another aspect, the two first hollow-profile polymeric spacers are arranged along two opposing first sides of the insulating glass unit and the two second hollow-profile polymeric spacers are arranged along two opposing second sides of the insulating glass unit. According to yet another aspect, the first polymeric hollow-profile spacers contain 5% to 50% and the second polymeric hollow-profile spacers contain 0% to 0.5% reinforcement fibers.