Heater

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

FIG. 2 is a rear 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.

FIG. 9 is an enlarged view thereof, taken from portion 9 in FIG. 1 ; and,

FIG. 10 is an enlarged view thereof, taken from portion 10 in FIG. 7 .

The broken lines in the drawings illustrate portions of the heater that form no part of the claimed design. The dot-dash broken lines in FIGS. 1 , 7 , 9 and 10 are included to show a partially enlarged view only and form no part of the claimed design.