Who has experience with Luetungs.net?

We already had everything finished - the entire planning plus structural analysis. The structural engineer knew that ventilation pipes would still be installed in the ceiling and later he received the installation plan from the company and approved it again.

Ok, I talked to the architect yesterday, he would do it that way too.

Where I am still not sure is where to place the valves on the upper floor. I have an open pitched roof with 25° and 220cm knee wall. So rather wall valves? Otherwise, the inlets in the bedrooms would be at 3.xx meters.

Does anyone perhaps have good literature on the topic?

Just ask the company - after all, they are the ones planning it