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

Hello everyone,
Is there actually a possibility to run the pipes in a suspended ceiling? Or why are they being installed in the floor especially in new buildings?

Sure, if you're up for it? Then about 8 cm or more in height will be lost, plus the considerable effort of suspending.

How do you lay the inlet/outlet pipes with the floor solution then?

Do you really lose that much when you consider that you want to hang down the ceiling anyway because of the installation of ceiling spotlights?

Who is suspending the ceiling in the new building because of spotlights? You can just cast it into the ceiling.

And yes, the suspended height remains.

You leave a hole in the ceiling structure or in locally cast ceilings beforehand, where you insert the valves.

Everything just needs to be planned in advance.

Oh, I haven't seen that like this before. Learned something new again. Are there pictures of something like that?

Here from our construction