So we are also facing the decision regarding the ventilation system. For me, the topic is equally simple and complex. Actually a simple decision, but then again not... because without moisture recovery, the air seems to become too dry and with it, you bring the problem of additional germs into the house – which is better now?! I’m not investing 10k€ just to have to set up a humidifier later or alternatively have a breeding ground for germs... man, man, man... somehow there is rarely a good middle ground in house construction. It’s similar with the heating! That’s annoying
Hi!
As we have already written here, you only have the problem of relatively low relative humidity on very few days per year. I personally still find 30-33% bearable.
Please consider with your decision: The ventilation system exchanges the air in the entire house roughly every 2 - 2.5 hours repeatedly. The air is fresh, filtered (reduces pollen allergies!), the living climate is pleasant, and mold formation is prevented.
You can hardly achieve this very pleasant result with window ventilation, at least not without time effort and loss of heating energy compared to controlled residential ventilation with heat recovery.
You do not bring germs into the house with controlled residential ventilation, at least no more than when you ventilate through windows.
Whether to set up a humidifier is up to everyone. Of course, the device must be meticulously maintained so that it does not become a breeding ground for germs.
The alternative is to occasionally open a window or dry a few pieces of laundry in the apartment.
Best regards
Thorsten