Isolated drywall chamber for controlled residential ventilation in the attic

No, unfortunately the house is not here in its entirety.

Not even as a draft discussion? – too bad. Am I correct with my assumption about the shape of the building?

Yes, exactly. 2 stories (without knee wall) and a gable roof with about 1.5 m attic height. Exterior dimensions of the building 10x12 m. And on the east gable side (ridge runs almost parallel to the east-west axis) I had imagined the controlled residential ventilation.

However, the kitchen with planned exhaust hood for extraction air is also on the east side on the ground floor. But due to the height difference, that should not be a problem and I won't be sucking the cooking air into the controlled residential ventilation, right?

It is not a problem to install the whole thing in an insulated small room. But precautions must be taken. Either a draft and exhaust hose must be in the small room, or a frost guard must be installed that activates as soon as the temperatures become critical. In any case, no pipes may lie uninsulated in the attic. These must either all be in the chamber or be insulated.

Either a supply air and exhaust air duct must also lie in the little chamber or you install a frost monitor that activates as soon as the temperatures become critical.
In any case, no pipes may be left uninsulated in the attic. These must either all be placed in the chamber or insulated.

Thank you for your answer. What do you mean by the supply air and exhaust air duct being in the little chamber? The supply and exhaust air ducts are laid through the exterior wall/masonry (gable) and the controlled residential ventilation unit stands directly behind the wall.

In theory, you could also lay the pipes outside the chamber on the floor of the attic, but they would then have to be insulated within the drywall construction. That shouldn’t really be much effort. Do you know people who have already done this and documented it on the internet?

However, the kitchen is also on the east side with a planned exhaust hood with ducted extraction on the ground floor. But due to the height difference, that should not be a problem and I am not sucking cooking air into the controlled residential ventilation, right?

Are you planning the controlled residential ventilation without heat recovery?

It is no problem to install the whole thing in an insulated small room.

Maybe you can show your plan? - if I remember correctly, you rearranged in the same way as the OP is asking now.

Yes

To let pipes from the controlled residential ventilation disappear relatively quickly into the concrete ceiling? It is insulated above with surface insulation.

The little chamber can easily be made 2 m wide, 2 m deep, and 2 m high. And then the pipes can be led within the chamber into the concrete floor?

Yes, that works. You simply lead the outside air and exhaust air in and out over the roof. A distance of at least 2 m between the two must be maintained.