Triangular patio heater

FIG. 1 is a perspective view of the triangular patio heater according to my claimed design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design.