Heater

FIG. 1 is a first perspective view of a heater showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is an enlarged view of the selected portion in FIG. 1 .

The equal length broken lines shown in the drawings are included for the purpose of illustrating portions of the heater that form no part of the claimed design. The dash dot broken lines in FIGS. 1 and 9 represent boundaries of the enlarged portions and form no part of the claimed design.