ᐅ Wall or roof penetrations (external / fresh air intake) – how have you installed them?

Created on: 27 May 2016 07:53
B
bortel
Hello everyone,

Since I now have to decide which wall or roof penetrations we need to use for the fresh air intake and exhaust air, I am looking into the various options available on the market.
On the north side, we have the possibility to take in fresh air through the gable. The north gable faces the street, so the solution should also look decent.
The idea is to route the exhaust air through the roof, but the south gable can also be used for exhaust air. The south gable faces the garden.

We are building a house on a slope, which means that from the street side you see one full story and the pitched roof with the attic and loft. The heat recovery ventilation unit will be installed in the loft.

So far, I haven’t found a fresh air intake and exhaust air solution that really convinces me.

What have you installed, and what makes sense?
We have a planner for the heat recovery ventilation system, but I want to take a broader look at what is available.

Regards,
Micha
B
bortel
27 May 2016 11:07
The planner said that a penetration through the roof isn’t necessarily better or worse than through the external thermal insulation composite system (ETICS). He also mentioned that fresh air intake through the roof can be more critical during snow compared to the gable.
andimann27 May 2016 11:10
Yes, 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). With that, your air intake would be about 40-50 cm (15-20 inches) above the roof. And how often do you have 40 cm (15 inches) of snow on the roof?

Best regards,

Andreas
B
bortel
27 May 2016 20:53
That is an argument.
I also get access to one side of the roof from time to time.
S
Sebastian79
27 May 2016 22:50
I deliberately decided against roof penetrations—had concerns about potential leaks and didn’t like how those vent pipes looked.

There is a stainless steel grille on both the north and south gable, powder-coated to match the color of the windows.

It looks good—our mechanical ventilation system is also installed in the attic.
B
bortel
28 May 2016 06:54
You also bought from Mr. Schliebe, which type of grid do you have exactly? And can you access both of them again if needed?
S
Sebastian79
28 May 2016 07:09
There is only one option, right? Thermal bridge-free wall penetration.

Sure, if I put a ladder there, I can reach it from the outside – but what for?