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