Gas-Fired Radiant Tube Furnace is designed for both light and heavy workloads. The furnace can be supplied for air atmosphere or endothermic, exothermic, or nitrogen atmospheres. Automatic gas-air flame curtain burner is standard equipment on all models. The temperature range is 2000°F. The single end recuperative burners are configured to insure a uniform heat pattern around the periphery of the workspace. It is a closed loop radiator type. The path of flow of the air upon entry from the blower line and preheated is initially upward through an annular.