FIG. 1 is a front elevational view of a heating tower fan showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a perspective view thereof;
FIG. 8 is a second perspective view thereof;
FIG. 9 is a third perspective view thereof;
FIG. 10 is an enlarged view of portion 10 shown in FIG. 1;
FIG. 11 is an enlarged view of portion 11 shown in FIG. 1;
FIG. 12 is an enlarged view of portion 12 shown in FIG. 2;
FIG. 13 is an enlarged view of portion 13 shown in FIG. 2;
FIG. 14 is an enlarged view of portion 14 shown in FIG. 3;
FIG. 15 is an enlarged view of portion 15 shown in FIG. 3;
FIG. 16 is an enlarged view of portion 16 shown in FIG. 4;
FIG. 17 is an enlarged view of portion 17 shown in FIG. 4;
FIG. 18 is an enlarged view of portion 18 shown in FIG. 7;
FIG. 19 is an enlarged view of portion 19 shown in FIG. 7;
FIG. 20 is an enlarged view of portion 20 shown in FIG. 8;
FIG. 21 is an enlarged view of portion 21 shown in FIG. 8; and,
FIG. 22 is an enlarged view of portion 22 shown in FIG. 9.
The broken lines shown in heating tower fan form no part of the claimed design.