Central ventilation system - is moisture recovery necessary?

I don't know what an upgrade to F7 costs at the next filter change, but according to other forums, it should work. At least it would be worth a try

We have an F7 filter installed by default - but unfortunately, this also does not prevent the slight smell when the neighbor "stokes" his wood stove (sometimes one might think a new Pope is being elected there :rolleyes

We have a rotary heat exchanger.

Why did you choose a rotary heat exchanger? The acquisition costs (including maintenance?) are probably higher than with "normal" plate heat exchangers.

**Edit: but the moisture recovery cannot be separately influenced/adjusted either (as is unfortunately also not possible with enthalpy heat exchangers), right?

exactly not with the normal one, only fins are flowed over. With the enthalpy heat exchanger the air is mixed. That’s the statement in the Rosa Technik forum. Maybe also dependent on the manufacturer. yes controlled residential ventilation but F5 filter mat

With an enthalpy exchanger nothing is mixed. The air being mixed is 90s technology.

Why did you choose a rotary heat exchanger? The acquisition costs (including maintenance?) are probably higher than for "normal" plate heat exchangers.

Had no special reasons.

How is the moisture removed and added to the fresh air?

via a semipermeable membrane. The air streams do not come into contact.

With a rotor, you always have a mixture of air flows, which is why these things are usually not used in sensitive areas. (At least not when it comes to larger air volumes beyond the controlled residential ventilation house usage areas) When I think of the WC exhaust after a nice chili or bean stew, or when there was fish... With a plate, you basically have less or hardly any odor transfer, although leaks can never be completely ruled out there either. If for whatever reasons (explosion protection, hospital) odor transfer or mixing of air flows must be excluded, usually a KVS is used, which, however, exceeds the (financial) limits.