For his private apartment on the newly added floor of a 1970s building in Steffisburg, interior designer Rolf Balmer focuses on combining timeless design with cutting-edge technology: In the bathroom, a Joulia-Inline (3-pipe) shower drain ensures efficient heat recovery right while showering. The system blends seamlessly into the sophisticated design concept of the private spaces and demonstrates how the characteristic style of that era can be harmoniously combined with state-of-the-art, sustainable building technology.