Choose the best refrigeration option for your Walk-In. Self-Contained Refrigeration units are typically the easiest option for most applications. They are mounted on the ceiling of your Walk-In and add to the height of the unit. They come pre-charged and are ready to operate. Remote Refrigeration units are mounted away from your Walk-In. They help to alleviate excess heat and noise. These units require professional installation but can save energy costs in the long run. Also select either a Left or Right Hinged door.