Heater

[0001]FIG. 1 is a front, right and top perspective view of a heater, showing our design.

[0002]FIG. 2 is a rear, left and bottom perspective view thereof.

[0003]FIG. 3 is a front elevation view thereof.

[0004]FIG. 4 is a rear elevation view thereof.

[0005]FIG. 5 is a left side elevation view thereof.

[0006]FIG. 6 is a right side elevation view thereof.

[0007]FIG. 7 is a top plan view thereof; and,

[0008]FIG. 8 is a bottom plan view thereof.

[0009]The broken lines depict portions of the heater, that form no part of the claimed design.