An important area of application for hydrogen in steel production concerns the reheating and heat-treatment furnaces field. Most reheating furnaces make use of direct flame burners having typically a rating from 500 to 3,000 kW. Based on the driving principle of offering hydrogen fueled, carbon-free and flameless burners for the industrial furnace world, the SMS ZeroFlame HY2 impresses with its flexibility, performances and (of course) environmental record. To optimize the sustainable production of existing steel manufacturing plants, the burner can also be used for retrofitting existing furnaces with installation solutions tailored by SMS group on the existing equipment to be upgraded. The burner can be operated with 100% natural gas as well as with 100% hydrogen - and all mixtures in between. This maintaining the ability to develop a long envelope of flame, a high turn-down ration and the ability to efficiently work in on-off or modulating regime: all characteristics necessary for the applications and the roles it is called to fulfill in a mature yet highly demanding industry. The dynamic of fluids that originates from the peculiar geometry and configuration of the burner creates a high turbulence dispersed combustion in full flameless regime, this results in very low emissions of nitrogen oxides, as low as 40 ppm at 3% O2 DFG.