ᐅ Is the wastewater venting in the garden shed adequate?

Hello everyone,

Our small garden shed (30 square meters (323 square feet)) is finally going to get wastewater pipes installed for the kitchen (sink) and bathroom (sink, shower, toilet).
Is a single ventilation pipe through the roof (near the kitchen) sufficient for the wastewater pipes (see sketch), or should an additional vent be planned in the bathroom area as well?

Thank you in advance!

Andreas

I'm not a professional, but I think adding a second ventilation makes sense. In the case of a garden shed, however, I wouldn't hesitate to include an internal ventilation system.

Thank you for the assessment. We had also considered an internal ventilation system; apparently, something like that can even be installed, for example, just under the sink.

What would be interesting now is: what is the best location, or where does it simply make no sense at all? ...