The company TŘINECKÉ ŽELEZÁRNY, a.s. is a metallurgy with a closed production cycle, which includes operations from primary production to the final hot-rolled steel product. The essence of the project is the replacement of equipment for preheating media in the high furnace VP6 — two pieces of fans and two pieces of heat exchangers (also called regenerators in the EP) for the same number of fans and exchangers, in order to reduce energy intensity and increase the efficiency of the preheating process of the media when heating the battery of wind heaters before VP6.