Wall or roof penetrations (external/supply air): how did you install them?

The planner said that running through the roof wouldn't be any better/worse than through the ETICS..?!? He also said that fresh air over the roof is always somewhat more critical in snow than at the gable?

Yep, I've also heard about the snow issue. But there are also "roof tiles with a small chimney attached" (please don't ask me for the exact name). That would place your air intake about 40-50 cm above the roof. And how often do you have 40 cm of snow on the roof?

Best regards,

Andreas

That is an argument. On one side of the roof, I also get to it every now and then.

Deliberately chose to forgo the roof penetration - had concerns about leaks and didn't like the way those [Pimmel] looked. We have a stainless steel grille on both the north and south gable, which was powder coated in the color of the windows. Looks good - our controlled residential ventilation is also located in the attic.

You also bought from Mr. Schliebe, which grid exactly do you have? And can you access both again if needed??

There is only the one option, right? Thermal bridge-free wall penetration.

Sure, if I put a ladder there, I can get at it from outside - but for what purpose?