Pipe installation: Supply and exhaust air over the doors or in the middle of the room?

Hello everyone,

as I have just discovered in a brochure from Maico, there seem to be two approaches to the central controlled residential ventilation installation:
1) the installation of the exhaust and supply air pipes that I have been familiar with so far, with their valves installed in the middle of the room and as far away from the door as possible in the ceiling / floor / wall, see here (planning from Selfio)

or
2) the installation of the exhaust and supply air pipes only up to the door, so that the pipe runs are as short as possible in the hallway, see here (brochure from Maico)


My question is now, who can assess to what extent which system is better? In planning threads here on the internet, one almost always only reads about option 1. Is the installation according to 2) now becoming popular? Can sufficient air movement be ensured there at all so that the controlled residential ventilation does its job well? Do you perhaps even have option 2 and are satisfied?

Please let me know what you think.
Thank you

I can't explain variant 2, how is air exchange supposed to take place in the room at the very back?!

Variant 2 is just the budget option. That means you only get a low level of mixing. But you save about a pound and fifty on pipes. Everyone has to decide for themselves what the priority is.

Maybe Maico is working with long-range nozzles in the supply air there. It wouldn't be my choice.

Allegedly, the mixing of the air in rooms not deeper than 6 meters is no problem.

But no one has had any experience with that, right?

In our ventilation planning of Vaillant, supply/exhaust air is similar to your Variante1. With Variante2, I simply cannot imagine how it could work.

Edit1: Just have a ventilation concept according to DIN 1946 created for Variante2 (or both).