Planning central ventilation system - volume flow, positioning?

Hmm, something different: why should the extra apartment be connected to it... if you guys are turning it up upstairs because you’re having a party/sauna/fondue/any other need, the person downstairs can’t sleep because the thing (unnecessary for them) is running at 3.
And if they just turn their valve down or up (since they can’t regulate it otherwise), it messes everything up for you upstairs.
I don’t really see that as optimal right now.

That the shared controlled residential ventilation for both residential units also brings disadvantages for the [Einliegerwohnung] is clear to me. However, I have not yet considered the option of turning off the valve. What would be the alternative? A second central controlled residential ventilation? Too expensive, I would say in general. That leaves decentralized ventilation units for the [Einliegerwohnung], right?

You can lock the valves, then there is a small hurdle. At least that works with ours from Wolf.

But the exhaust air valves should get filters that need to be changed regularly, also in the apartment.

The alternative is decentralized for the apartment.
Our controlled residential ventilation almost never runs in party mode. That would be appropriate with shared ventilation and also no drama. If in doubt, you just ventilate the classic way. That is recommended anyway for large parties.

Use the planning service from Zehnder as a basis. If you then install their materials and have Zehnder carry out the commissioning, the warranty is extended to 5 years.

Is your information still current? I asked Zehnder last year if they could review the planning of the controlled residential ventilation. I was told that the service no longer exists and that I should contact my specialist company.

That's true, when many people are there, the ventilation is no longer sufficient, then you have to open windows. We have various sensors connected, you become a tinkerer, e.g. a humidity sensor so that the ventilation switches up from a certain value. Then it is set that if the extractor hood runs longer on level 3, the ventilation also goes up. CO2 sensor in the bedroom etc etc.

to the point: So I would definitely disconnect the granny flat and give it a decentralized device.

Is your info still current? I asked Zehnder last year if they could review the controlled residential ventilation planning. I was told that the service no longer exists and that I should contact my specialist company.

Guess it’s worth a try then.