Install controlled residential ventilation yourself, stick to the schedule, costs?

Hello Satisfied

The ventilation unit has exhaust and fresh air with supply lines to the outside.
The supply and exhaust air lines run through air distribution boxes into the living rooms.
The distributors usually have six or ten connections and thus cover
the area required in a single-family house.

Olli

Lüftungs.net - competent and fair.

Well... I also bought everything from the shop. The nice man is willing to help, but sometimes he has no clue what he is selling. The prices are great.
Did they plan the system? I planned and installed it myself.

I cannot make a corresponding calculation - it was planned by them. I worked out and changed certain details myself, but in principle the planning was good. Fortunately, I was not clueless there...?

I spoke with a shell builder over the weekend; he would recommend routing the pipes on the ceiling (in the screed), but what I don’t understand is how the ventilation outlets are then designed effectively? I want to have them in the ceiling. How did you solve this?

Typical shell builder

You just have to make core drillings through the ceiling.

Yes, I also had that feeling a little bit..

What should be considered during the planning, what would you change? Maybe Vitalio also has one or two suggestions?