Heater

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

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is an enlarged view of the encircled area 8 of FIG. 1 ;

FIG. 9 is an enlarged view of the encircled area 9 of FIG. 2 ; and,

FIG. 10 is an enlarged view of the encircled area 10 of FIG. 3 .

The broken lines shown on the drawings depict portions of the heater that form no part of the claimed design. The dot-dash lines depict the enlarged view boundaries that do not form part of the claimed design.