FIG. 1 is a perspective view of the baseboard heater of the present design.

FIG. 2 is a front view of the baseboard heater.

FIG. 3 is a rear view of the baseboard heater.

FIG. 4 is a top plan view of the baseboard heater.

FIG. 5 is a bottom plan view of the baseboard heater.

FIG. 6 is a right side view of the baseboard heater; and,

FIG. 7 is a left side view of the baseboard heater.

The broken-line showing of environmental structure in FIGS. 1-7 is for illustrative purposes only and forms no part of the claimed design.