Isolated drywall chamber for controlled residential ventilation in the attic

My question is only: if I cook downstairs and blow the kitchen air out of the house via the extractor hood, whether the distance from the ground floor to the attic is sufficient if I draw the outside air into the attic above the exhaust extractor hood.

This was obviously understood correctly not only by me.

Whether the kitchen odors practically mix sufficiently with the air outside the house so that I do not suck the kitchen odors back in via the controlled residential ventilation.

The kitchen odors are not so hot that they rise straight up like an arrow—even in absolute calm. By the time of intake at the gable, the cards are shuffled again.

In the attic it would be better to go through the gable wall side rather than through the roof itself, right?

The wall breakthrough is structurally significantly simpler than one through the roof membrane. After all, the exhaust air is not flue gas, so its outlet does not have to be a chimney. Of course, wind can sometimes press on the gable, but that’s not a drama. The planned solution is not a special case and certainly not a premiere, you can safely "dare" it.

The exhaust air of a kitchen hood actually has nothing to do with this since it forms a separate system. As far as I can see from the explanations, an automatic shutdown of the controlled residential ventilation should be provided when the hood is running.

Yes, of course, the exhaust air / the kitchen hood from the kitchen has nothing to do with the controlled residential ventilation and they are two different systems. The question was only whether the kitchen odors, which are blown out of the house via the kitchen hood one and a half floors above, could be brought back into the house via the controlled residential ventilation. But as already wrote, they will probably mix with the outside air even in windless conditions, so they will not be blown back into the house via the controlled residential ventilation.

And yes, thanks for all the answers. So nothing should stand in the way of the insulated little room in the attic.

to what do your 2 m distance refer? As far as I read, to the distance between the supply and exhaust air of the controlled residential ventilation or one simply takes the hoods from Vallox e.g.

you have decided on complete insulation of the attic. This is probably always more expensive than insulation on top. Do you now actively heat the attic as well and what do you use it for? We actually only need it primarily as storage space, so complete insulation would probably be financially nonsense?

The 2m distance refers to the two necessary breakthroughs to the outside for the controlled residential ventilation (wall/roof/basement), i.e., exhaust air and fresh air.

Okay, just as I thought. That should be doable by simply making the little chamber 2 meters wide and placing the supply and exhaust air openings on the respective sides.

Yes, it is doable. But you will still have to live with partially strong odors (unless you use activated carbon filters). In other words, any kind of open fire in the neighborhood or even a lit fireplace will be smelled inside the house, as it is drawn in through the controlled residential ventilation.

Yes, this is a general controlled residential ventilation problem. It just occurred to me that a controlled residential ventilation system in the basement, which draws air through an intake tower just above the ground (admittedly visually less appealing), brings grill odors into the house less than a controlled residential ventilation system in the attic?

The grill and smoke odors will probably reach the 2nd floor / attic rather than 1 meter above the ground at the house. Ideally, the hedge between the properties mostly keeps the odors away near the ground?