Heater

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

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

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation 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 detail “ 9 ” identified in FIG. 3 .

The dashed lines in the figures illustrate portions of the heater that form no part of the claimed design. The dash dot dash lines in FIGS. 3 and 9 are for the purpose of illustrating the enlarged view indicators and form no part of the claimed design.