Laundry chute - Hygiene? How to keep it clean

that such a discharge does not develop into a bacteria breeding ground over time...

Why should it? The laundry is never in there longer than 0.4 seconds. The KG pipe is made of PVC and is smooth inside. What bacteria should settle there?

Is it one long pipe or several pieces connected with couplings or similar? Then you have edges - not everything smooth.

Sure, it's only a fraction but I also only touch a fraction of the door opener in the hospital and have bacteria etc. on my hand.

It would be different if the pipes were made of antibacterial metal?

How long will the shaft be? We have also planned a shaft from the future bathroom to the heating room (ground floor, directly opposite are the washing machine/dryer, ironing board, clotheslines for drying). I don't think it really needs to be cleaned intensively – and even if it does, you can surely repurpose a long brush (chimney sweep :cool).

The really dirty laundry "happens" on the ground floor anyway: muddy clothes from outside, various towels (often used during construction work…), dirty tablecloths/upholstery after garden parties, etc. In addition, when something is soaked, it is done directly between the washing machine and the sink in a small tub. None of that has to go through the pipe. Carrying it upstairs is also done the easy way: The new dressing room is right next to the elevator shaft, which is conveniently only 2m from the "washing mile" on the ground floor. No more lugging.

As a rule, it is 1m KG pipe with a diameter of 300mm. No edges, sockets, or the like. It is less a shaft, more a hole that is 1m long.

Yes well, that could even be cleaned easily if needed. But in a two-story house with a basement, it becomes more difficult to clean the discharge from the bathroom on the first floor to the utility room in the basement.

A bit off-topic: with controlled residential ventilation, there are special cleaning companies that check and clean the pipes every few years, right?

With controlled residential ventilation, there are special cleaning companies that check and clean the ducts every few years, right?

Yes, of course there are. But you have to take care of everything yourself, and a few years are more like a few decades, unless you live near a highway or something.