In the years 1991 to 2008, the ensemble consisting of galeria, reception building, and visitor center was created, forming the representative entrance to the Viessmann plant site in Allendorf.

The galeria with museum was planned as a glass, elevated structure and connects the information center with the reception building. Visitors first receive information about current heating-technology products, pass through the museum showing the company’s history and the work of Hans Viessmann, and can gain insights into the large production building via the so-called “Via Temporis.”

The futuristic-looking building was constructed with an elliptical cross-section. The structural framework consists of two lattice-girder trusses connected at the nodes of the upper and lower chords.

The reception building is connected to the gallery by a transparent connecting structure, described as a “glass seam.” On three levels, there are training and meeting rooms as well as spaces for corporate management and sales. The façade is designed as a glass curtain wall with cantilevered escape and cleaning balconies in galvanized steel construction. The exterior sun protection was arranged at the level of the escape balconies.

In 2008 the information center with a heating plant accommodated the increasing number of customer trainings and plant tours and includes, in addition to a sales outlet, seminar rooms and a spacious reception and restaurant area with an adjoining terrace deck.