Ventilation in prefab houses (wood frame with ETICS) also in solid houses?

The main unit of the ventilation system is a sound source, depending on the setting / dimensioning more or less. Especially when you reach the upper point of the system, it becomes noticeably louder. With appropriate sound insulation on the supply / exhaust air, however, it is such that especially in the bedrooms nothing can be heard even at normal operating points. In the building services room it is different. In our design we have about 2-3°C temperature difference between the exhaust and supply air rooms (living room & kitchen with dining area currently about 24 degrees, bedrooms accordingly lower, however we have installed a large solar coil with about a 70m² / 75m long flat collector, which cools down to about 20°C in front of the heat exchanger even at 35°). Dryness of the air is certainly a discussion point, almost every manufacturer has an enthalpy heat exchanger available, but the surcharge is significant. Those extremely sensitive to humidity should rather consider adding a humidifier to the ventilation unit. Because I just saw annual filter change: these are manufacturer estimates, which can be significantly too long or too short depending on the environment. In larger systems for apartments there is very often a filter pressure monitoring built in to measure the actual contamination. When the filter is clogged, most systems try to compensate by increasing the speed - the sound level of the device becomes significantly higher. Very nicely this can also be seen in the corresponding programs, how the speed increases over the lifetime of the filter. For us it is an extreme gain in comfort in the solid house, dust is also not an issue for us in the house. To prevent a short circuit of odors, the connections should be as far apart as possible AND the prevailing wind direction should also be considered, or if it is on the street side (like for us) the driving direction right next to the house.