Systems consisting of thermal regenerators and laminar-flow burners are being developed step by step for industrial use and tested in industrial facilities.  A system was developed for operation with low-calorific fuel gases such as process gases and biogas. The aim is to achieve optimal furnace operation with low energy demand, variable fuel gas input, a high quality of the charge material, and long life. In several development stages, systems were implemented on reheating furnaces in the steel industry.