Posted on Aug 12, 2014 in | 0 comments

The ornamental design for an radiant heater, as shown and described.
FIG. 1 is an isometric view of a first embodiment of the radiant heater according to the invention, showing the front face as curved and having a face mesh with oval holes;

FIG. 2 is a front face view of the radiant heater of FIG. 1;

FIG. 3 is a back elevation view of the radiant heater of FIG. 1;

FIG. 4 is a top view of the radiant heater of FIG. 1;