Seal exhaust pipe wall box exterior wall

Hello everyone,
our exterior wall consists of 17.5cm bricks + 17cm ETICS.
Today, the wall was built with bricks. I asked the craftsman to make an approximately 15cm hole for the exhaust pipe in the kitchen. I wanted to order the Naber E-Jal 150 wall box including THERMOBOX afterwards.
Questions:
- I am a bit desperate whether the activity is correct. Should we rather wait a bit and work with core drilling later?
- The hole does not look properly round (see picture). How should I best seal the pipe? According to the installation instructions from Naber, the use of PU foam is not allowed as it presses against the pipe.
- When is the best time to install this system? There is still ETICS, plaster... How did it go for you?

I know it's unusual to install exhaust ventilation now during new construction. We cook very intensively, so we would like to have it.

THANK YOU for your help.

I know that it is not common to still use exhaust air in new construction. We cook very intensively, so we would like to have it.

Exhaust air is completely normal. Naber exhaust air systems are even partly suitable for passive houses – the simpler versions also easily pass the Blower Door test.

According to the installation instructions from Naber, the use of PU is not allowed because it presses against the pipe.

I know that when it is fiddled with like you do, foam insulation is used to seal it. Properly and correctly, of course, a core drill and compressible tape or similar would be used.

Hello ever more

the bricklayer put real effort into the grinder. There are worse things.
I would do a core drilling at the end. Costs 100 euros.
The bricklayer should close it again. But properly. 3 new bricks. Give him 20 euros.

Steven

Hello immermehr

the bricklayer really put a lot of effort into the angle grinder. It could be worse.
I would do a core drilling at the end. Costs 100 euros.
The bricklayer should close it up again. But properly. 3 new bricks. Give him 20 euros.

Steven

Hi Steven,
can I leave it as it is and later, if needed, expand/work exactly there with core drilling?

If you have controlled residential ventilation, I would take the box with draft and exhaust air.

If you have controlled residential ventilation, I would take the box with draft and exhaust air.

Yes, I have controlled residential ventilation. Do you have such a box in use? Can you recommend something?