3. Bottom-Freezer Built-In RefrigeratorWhat it is: Built-in units are typically 80 to 84 inches tall and 24 to 25 inches deep to the face of the door. The entire unit, including the door, is flush with the depth of most standard base cabinets. Bottom-freezer units are also referred to as over/under refrigerators; they most often come in 27-, 30- or 36-inch widths. Variations: You can get most bottom-freezer built-ins in both stainless steel and panel-ready options, as well as glass fronts. When to use: These are great for smaller kitchens because of the width. If you have a larger kitchen, you can use two of them side by side. The best location for this style of refrigerator is at the end of a cabinet run where the door swings open to the work triangle. You can specify the single-door units to have a right hinge or a left hinge.