Fan

FIG. 1 is a bottom, front, right-side perspective view of a fan of the present disclosure; FIG. 2 is a top, rear, left-side perspective view of the fan shown in FIG. 1 ; FIG. 3 is a front elevational view of the fan shown in FIG. 1 ; FIG. 4 is a rear elevational view of the fan shown in FIG. 1 ; FIG. 5 is a left-side elevational view of the fan shown in FIG. 1 ; FIG. 6 is a right-side elevational view of the fan shown in FIG. 1 ; FIG. 7 is a top plan view of the fan shown in FIG. 1 ; and, FIG. 8 is a bottom plan view of the fan shown in FIG. 1 . The broken lines shown in the drawings are for the purpose of illustrating portions of the fan that form no part of the claimed design.