Heater

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

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

FIG. 3 is a front view thereof;

FIG. 4 is a rear 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 a portion 9 of 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.