The ornamental design for a grille for an airconditioning unit, as shown.
FIG. 1 is a front elevational view of a grille for an air conditioning unit
showing my new design, it being understood that the grille pattern is
continuous through the area indicated.
FIG. 2 is a top plan view thereof.
FIG. 3 is a side elevational view thereof.
FIG. 4 is an enlarged fragmentary front view thereof showing the left end
of the grille.
In the drawings the closely spaced horizontal and vertical lines depict a
continuation of the circle motif shown in association with those lines.