10x10m city villa (approx. 155m², 6 rooms), fine-tuning desired

For example, window rebate ventilators or decentralized ventilators.

And what did you install?

But that is exactly not up to standard, a shelf air or decentralized fans are unfortunately not the norm.

I admit, I have no knowledge of that at all. Is there an overview of the different types of roads and required distances?

Overview? - no, sixteen federal states. A pedestrian and driveway is a (quite legally mostly only for residents) passable public path, without a sidewalk, and often not treated as a street regarding carport distances. A private road is a private property developed with a street.

But exactly that is not standard-compliant, a shelf air or decentralized fans are unfortunately not the norm.

The only thing that does not seem standard-compliant to me here is your incorrect use of this term and your constant spaces before punctuation marks.

Please explain it to me, it is simply not correct what you are writing, and therefore you do not have to start being snippy elsewhere right away.