Federal Pedagogical Institute for Lower Austria, St. Pölten: “The construction of a house from the foundations to the roof”, “Ecological building, practical use of solar energy”, “Examples”.

1990.01.26

Puchberg Educational Center, Conference: “Living and heating with solar energy”.

1990.04.28

Seminar: Healthy living with the sun, Energiesparverein Vorarlberg, Viktorsberg: “The use of the sun’s rays” (Reinberg u. Treberspurg)

1990.05.17

University ITESO, Escuela de Arquitectura, Guadalajara, Mexico: “Ecologia y Arquitectura”.

1990.09.04

Puchberg Castle Educational Center, Conference: “Ecological building – building with the sun”.

1990.12.15