Model 2000S mounts recessed in the wall to give a final appearance that is flush with the wall surface. It is 14.25” wide and fits between standard 16” studs. This unit does require the drain to be plumbed. Model 2000SMS mounts directly on a mounting plate that is affixed to the wall. This unit is easy to install, and is well suited for masonry walls. The plumbed drain is optional.