Disclosed is a refrigeration unit having a drawers housing structure to accommodate two or more drawers positioned, within the housing structure, at a substantially similar height to each other and over the same plane. The drawers housing structure includes a transparent, substantially flat, top surface to collectively cover the top openings of the two or more drawers when positioned within the housing structure, while enabling a top view through the transparent surface, of items stored in the drawers.

A museum display case with climate control comprises a case bottom, a display space above the case bottom, a shelf inside the display space, and a housing for hygroscopic material facing into the display space below the shelf. The housing includes a housing window open in the case bottom, a housing frame fixed to the case bottom below the housing window, and a tray mounted in the housing frame. The tray is horizontally and vertically movable between a working position where the tray is raised vertically towards the display space at the window and a service position where the tray is at least partly pulled horizontally out of the housing frame.