The ornamental design for a filterhousing, as shown and described.
FIG. 1 is a view from above and left showing the filter housing according to the design;
FIG. 2 is a view from above and right of the design shown in FIG. 1;
FIG. 3 is a view from below and left of the design shown in FIG. 1;
FIG. 4 is a left side view of the design shown in FIG. 1;
FIG. 5 is a right side view of the design shown in FIG. 1;
FIG. 6 is a view from above of the design shown in FIG. 1; and,
FIG. 7 is a view from below of the design shown in FIG. 1.
A design for a disk shaped filter housing which comprises top and bottom complementary disk shaped cups, which fit together to house a filter (not visible). Each cup includes a generally central opening for fluid flow across the housed filter.