The ornamental design for a heatingdevice, as shown and described.
FIG. 1 is a perspective view of a heating device showing our new design;
FIG. 2 is a front elevational view showing the design for the heating device of FIG. 1;
FIG. 3 is a rear elevational view showing the design for the heating device of FIG. 1;
FIG. 4 is a left side elevational view showing the design for the heating device of FIG. 1;
FIG. 5 is a right side elevational view showing the design for the heating device of FIG. 1;
FIG. 6 is a top plan view showing the design for the heating device of FIG. 1; and
FIG. 7 is a bottom plan view showing the design for the heating device of FIG. 1.
FIG. 8 is a perspective view of the heating device of FIG. 1 showing a bounded area that is shown in FIG. 9;
FIG. 9 is a perspective view showing an enlarged portion of the heating device of FIG. 1 within the bounded area of FIG. 8;
FIG. 10 is a front elevational view of the heating device of FIG. 1 showing a bounded area that is shown in FIG. 11; and,
FIG. 11 is an enlarged front elevational view of the heating device of FIG. 1 within the bounded area of FIG. 10.
The broken lines shown in the drawings illustrate portions of the heating device that form no part of the claimed design. The lines identifying the bounded areas of FIGS. 8 and 10 form no part of the claimed design.