At this fair regional manufacturers and suppliers present the latest facts and innovations on various topics covering building, housing, renovating and energy-saving. Whether photovoltaics, heat pumps, wooden pellets or else, the event informs the visitor on various ways of saving energy - for the environment's sake as well as the sake of money saving. The popularity of these issues is demonstrated by the continuously strong public interest. Free information lectures expand the offer of this event beyond a simple building fair.