We claim the ornamental design for a blower housing, as shown and described.
FIG. 1 is a front perspective view of a blower housing showing our new design;
FIG. 2 is a front view of the blower housing shown in FIG. 1;
FIG. 3 is a rear view of the blower housing shown in FIG. 1;
FIG. 4 is a right side view of the blower housing shown in FIG. 1;
FIG. 5 is a left side view of the blower housing shown in FIG. 1;
FIG. 6 is a top plan view of the blower housing shown in FIG. 1; and,
FIG. 7 is a bottom plan view of the blower housing shown in FIG. 1.
In these drawings, the solid lines illustrate the claimed ornamental design, whereas the broken lines illustrate unclaimed environmental features and form no part of the claimed design.