The ornamental design for a humidifierheaterbase, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a top, front and right side perspective view of a humidifier heaterbase embodying our new design.
FIG. 2 is a top, rear and left side perspective view thereof.
FIG. 3 is a front view thereof.
FIG. 4 is a rear view thereof.
FIG. 5 is a right side view thereof.
FIG. 6 is a left side view thereof.
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
Broken lines are used to illustrate features of the humidifier heaterbase which form no part of the claimed design.