Some good 48-inch refrigerators are the Jenn-Air JS48NXFXDW, the Thermador Freedom Columns T18IF800SP and T30IR800SP and the Sub-Zero BI-48S/S/PH. Another good option is the Sub-Zero 648PRO.
Refrigerators are generally available in 24-, 30-, 33-, 36-, 42- and 48-inch widths to fit standard cabinets. A 48-inch refrigerator can be the glamour piece of a kitchen due to its size. Most upscale companies, including Viking, Jenn-Air, Thermador, GE Monogram, KitchenAid and Liebherr, manufacture a 48-inch fridge.
A professional refrigerator has commercial styling with the compressor on top. Until about 2010, buying a professional refrigerator was the only way to purchase a 48-inch fridge. However, companies have since released integrated refrigerators. They are different from professional fridges in that they allow for no seams between the product and cabinet. Owners can also obtain an integrated 48-inch refrigerator by combining 30- and 18-inch column refrigerators.
As of 2015, the Jenn-Air JS48NXFXDW has an attractive price and its purchase comes with a rebate program. Thermador's Freedom Columns refrigerators also come with a rebate program and their columns work very well with good cabinets. Sub-Zero has been dominant in the 48-inch refrigerator niche for a long time. Their BI-48 has twin compressors, magnetic gaskets and a vacuum seal to keep air out of the refrigerator, while their 648PRO emulates a restaurant refrigerator.