Floor construction in height with Vallox KWL pipe routing questionable

And as I said: according to my craftsmen, the boxes must be accessible for maintenance!

I also think the minimum length of 5 meters was not adhered to in the drain in the bathroom.

I also think the minimum length of 5 meters was not maintained at the drainage in the bathroom.

What is meant by this? Where would there need to be 5 meters between?

Outgoing distributor to outlet

Between the distributor and valve to avoid telephony noise between the rooms.

That is interesting. Well, the main representative in Gießen of Vallox could not confirm a delivery bottleneck now. This will be exciting.

Would anyone happen to know which ventilation manufacturers have relatively flat duct distributors in their program or require less installation in the system?