US D304856 S
FIG. 1 is a front elevational view of a heat exchanger showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a left side elevational view thereof, the right side being a mirror image;
FIG. 6 is a front perspective view thereof, the rear being a mirror image.
The rear perspective view thereof is substantially the same as a front perspective view thereof.