Integrated window ventilation: Choose passive or active system?

Integrated window ventilation: Choose passive or active system? What is better? These are considered alternatives to central/decentralized ventilation systems. What are your experiences with them? There is an older thread, but it does not sufficiently address the specific topic.

Both are nonsense. You can file it away.

Why? I see that differently. As an alternative to installing a ventilation system, an integrated window ventilation could be useful.

No, it is not, but it has already been discussed here several times.