These radiant wall burners provide close coupling of radiant heat sources for use in “in-line” arrangements where relatively “light” heating jobs are to be performed. Designed essentially for radiant heating in continuous-belt furnaces, wall burners also find frequent application in ovens, as well as in heating stationary objects. The 500 Series is available in a variety of cup configurations to permit several self-piloting geometric arrangements. The small 200 Series and large 700 Series, however, are currently available for straight-line use only.