PRODUKTFILM
https://www.youtube.com/watch?v=hjh9qDHX4yo&feature=youtu.be
DZ4 Easy – Christine Friedrich
https://www.youtube.com/watch?v=1LSy9LgYYfc&feature=youtu.be
DZ4 Autark – Michael Ruhkieck
https://www.youtube.com/watch?v=LX2wM5bTSqg&feature=youtu.be
DZ4 in der Praxis – Dachdeckerei Huber
https://www.youtube.com/watch?v=EcFRsp1TYMc&feature=youtu.be
DZ4 Autark – Matthias Gülck