Theme and feature of the whole event is coal as an indispensable source of energy and essential for heating systems in the time of Sulzer.

With the help of a leaflet the guests find themslves in a relaxed room and enjoy the new structure with its various uses. In the bar a gigantic curtain made from single bits of coal reminds the visitor of the fact that the fuel used to be poured from a height of 6m into the room in front of the furnaces. The true heart of the factory, the furnace anf the boilers, were fed with coal aat.nd produced energy. Nowadays this is more abstract. In the shops coal (=German slang for money) is changed into energy (=food and entertainment), and so the boiler house functions in a new way.