The ornamental design for a heaterextensionmodule, as shown and described.
Cross reference is made to copending U.S. design patent application Ser. No. 29/645,597 entitled “Heater Extension Module” by Kollmann et al., which was filed on even date herewith.
FIG. 1 is a perspective view of a heater extension module showing our new design;
FIG. 2 is a front elevational view of the heater extension module of FIG. 1;
FIG. 3 is a rear elevational view of the heater extension module of FIG. 1;
FIG. 4 is a right side elevational view of the heater extension module of FIG. 1;
FIG. 5 is a left side elevational view of the heater extension module of FIG. 1;
FIG. 6 is a top plan view of the heater extension module of FIG. 1; and,
FIG. 7 is a bottom plan view of the heater extension module of FIG. 1.
The broken lines shown in the drawings illustrate portions of the heater extension module that form no part of the claimed design.