Condensation water window UNILUX new construction

Hello, the window company and UNILUX deny everything. Allegedly too many plants and aquariums (2) in the house and therefore too high humidity. The architect thinks the window frames might be poorly insulated. In any case, during the cold period it was at least 5°C colder at the windows than in the center of the room and the rLF at the window > 80%. Completely clear that it then condensates. We have now ventilated by the windows for days like world champions, rLF is currently < 50% and currently no condensation. I hope it gets really cold outside again, then we will see if it occurs again.

We also have the Isostar windows and also around 55% humidity, that alone can't be the cause. I even put bowls of water out in winter sometimes because it gets too dry when heating. A humidity of 25% is harmful to health, it can no longer be called a healthy indoor climate. Where else should the humidity be lowered to then? Our windows also fog up, but only on the outside. The innermost pane always feels "warm," just put your hand on it. Even in the basement, where we have 15°C and 55% humidity, there is never any condensation. Oh, and we only ventilate once a day.

Hello Passive House, are there any new experiences or results?

Not yet. I am eagerly awaiting the next winter.