Switzerland is very similar to Germany in many regards. In one regard, the washing machines and drying machines are often kept in the basement of apartment buildings.
In my case, the apartment company furnishes the machines for the use of the residents.
Here is the room with the drying machines:
In America, the drying machines blast hot air through the clothes, and the warm humid air is vented directly to the outside. It’s tough on the clothes, and it requires the machines be placed in close proximity to an outside wall.
Here, normal air is blasted through the tumbling clothes. As it exits the machine it passes through a condensation chamber, and the water is condensed out of the air. Better on the clothes, and it means you can position the drying machine anywhere you like.
Here is a snap from the back that shows the water tubes that drain the condensation chambers into the water drainage in the building: