FIG. 1 is a front view of a hand dryer showing our new design. The back of the hand dryer unit is unadorned and its design is disclaimed herein. FIG. 2 is a front, right-side perspective view thereof. FIG. 3 is a side view thereof; and, FIG. 4 is a top view thereof. The bottom of the hand dryer unit is unadorned and its design is disclaimed herein.