SECO/WARWICK’s annealing furnaces exploit several different designs to ensure temperature uniformity. SECO/WARWICK holds patents for innovations on controlling airflow recirculation over various size loads, increasing heat transfer and uniformity. Our furnaces incorporate both vertical airflow with specifically designed vertical baffles on each side of the load, or the high-velocity directed mass flow system. In either case, the vertical baffles improve air stream uniformity and separate the load from direct heat radiation. Radiant tubes for either gas-fired burners or electric heating elements provide indirect heating, protect the load from direct heat radiation, and maximize temperature uniformity.