Achieving appropriate temperature uniformity in a heat treat application with direct fired burners requires paying particular attention to burner type, spacing and arrangement. Selection of the appropriate burner technology is crucial for achieving required uniformity. This paper explains the importance of proper burner placement (spacing and arrangement) and will describe advancements in burner technologies that provide important options to achieve required temperature uniformity. The paper concludes with several short case studies explaining the application of spacing, arrangement and technology to achieve the proper temperature uniformity in the furnace. These case studies are relevant to thermal processing of titanium, steel, and aluminum components.