Heating device

Description

FIG. 1 is a front, top and left side perspective view of a heating device, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is a left side view thereof.

The rear and bottom views are not shown and form no part of the claimed design. The features shown in broken lines depict portions of the heating device that form no part of the claimed design.

Claims

The ornamental design for a heating device, as shown and described.