Furnace

FIG. 1 is a perspective view of a furnace showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is an enlarged view of encircled area 8 in FIG. 1 ;

FIG. 9 is an enlarged view of encircled area 9 in FIG. 1 ;

FIG. 10 is an enlarged view of encircled area 10 in FIG. 2 ;

FIG. 11 is an enlarged view of encircled area 11 in FIG. 5 ;

FIG. 12 is an enlarged view of encircled area 12 in FIG. 6 ;

FIG. 13 is an enlarged view of encircled area 13 in FIG. 7 ; and,

FIG. 14 is an enlarged view of encircled area 14 in FIG. 7 .

The broken lines depict portions of the furnace that form no part of the claimed design. The dot-dash-dot lines depict boundaries of the furnace and form no part of the claimed design.