Heater

FIG. 1 is a top, front right perspective view of the heater showing my design in a first state with a top cover closed;

FIG. 2 is a left view thereof;

FIG. 3 is a right view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a top, front right perspective view of the heater showing my design in a second state with a top cover open; and,

FIG. 9 is a top, back left perspective view of the heater showing my design in the first state with the top cover closed.

The broken lines represent portions of the heater that form no part of the claimed design.