Fan

FIG. 1 . is a perspective view of a fan showing the design;

FIG. 2 . is a second perspective view thereof;

FIG. 3 . is a front elevation view thereof;

FIG. 4 . is a rear elevation view thereof;

FIG. 5 . is a left side elevation view thereof;

FIG. 6 . is a right side elevation view thereof;

FIG. 7 . is a top plan view thereof; and,

FIG. 8 . is a bottom plan view thereof.

The broken lines depict portions of the fan that form no part of the claimed design.