US D326706 S
FIG. 1 is a top perspective view of an air filter housing for use in a factory, laboratory or the like showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a front elevational view thereof; and,
FIG. 6 is a side elevational view thereof, the other side being identical.