Heater

FIG. 1 is a front, top and right side perspective view of a heater, showing our new design;

FIG. 2 is a rear, bottom and left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged view of portion 9 shown in FIG. 1 thereof.

The broken lines shown in the drawings illustrate portions of the heater that form no part of the claimed design.

The dot-dash broken lines shown in FIGS. 1 and 9 represent the designation of an enlargement view and form no part thereof.