Controlled residential ventilation - alternative positioning of supply air valves

Hi everyone,

I have a question about the position of the supply air valves of the ventilation system. In the ground floor and basement, the ventilation ducts are installed in the ceiling. On the upper floor, we do not have a ceiling above the bedrooms, so it is not suspended (gable roof) and therefore the rooms are high. The idea was to install the ventilation ducts in an installation level that runs parallel to the roof so that we can keep the high ceilings.

What was not taken into account, however, is the ring beam! We can now not (or only with difficulty) get directly under the roof into the bedrooms. Suspending the ceiling by half a meter or even completely (parallel to the floor) is not an option for me, because that would ruin the nice high rooms…

Is it possible to position the supply air valves next to the door or bed (see plan in red)? The position is probably not optimal because you want the whole room to be ventilated. However, the supply air valves also blow air into the room, so I don’t think the air will be directly drawn out again through the door. Right above the bed is also not optimal, although the valve does not blow downward from above, but into the room.

To make it a little clearer, below in blue is the originally planned position of the valve. In red is the new one without an installation level (2 variants: right or left of the door).



Thank you very much for your answers.

We will get back to you when we have the next floor plan. But then from the architect.

That was two and a half years ago. What has happened since then, do we already know "the whole house" on this question from the old thread?

Yes, a lot has happened. No, the house was not discussed in the forum.

However, at that time we did the only right thing and hired an architect who designed our house tailored to our plot.

I also have the valves in the wall of our granny flat.

Why not simply in the screed?

We want to avoid having the valves in the floor. I already brought this solution into play during the original planning. We were advised against this from various sides. Positioning the valve on the wall is generally not a problem. However, it would be the same wall where the door is located, through which the air is extracted again ([Abluft im Badezimmer]).

I would also tend to the floor.
What speaks against it?
Over the bed or next to the door doesn't sound so good.