Nilan ventilation system with controlled heat recovery

I only read that the moisture recovery cannot be dosed, meaning the system always releases the same amount. And then it could lead to too high humidity?

No, part of the moisture is recovered from the exhaust air. The heat exchanger consists of a membrane that allows water molecules to pass through. If there is a moisture gradient between the exhaust air and fresh air, it will be balanced (to a certain extent) via the membrane.

The additional cost is about 1000 euros.

I don’t know if that is generally true. The difference is only in the heat exchanger (I think nowadays the enthalpy heat exchanger is practically standard). A controlled residential ventilation system costs 10,000 to 15,000 euros for a house, whether with or without moisture recovery. The actual price then depends on several aspects. If you choose a system type with moisture recovery from the start, the additional cost might maybe be zero :P?

As mycraft has already emphasized several times, with a controlled residential ventilation system without moisture recovery, you have very dry air in the house. We have between 20% - 22% humidity in winter, which is already very low.

And do you want to change anything about that, Master Keks?

Hi, definitely build with [Kontrollierte-Wohnraumlüftung]. We have already created several expert reports concerning mold that formed due to a missing [Kontrollierte-Wohnraumlüftung]. New buildings are simply too airtight, and ventilating is a tricky matter.

Yes, I am also working on the system. I am just not sure if it will be a system with moisture recovery.

And do you want to change anything about that, Master Cookie?

As far as I know, you cannot retrofit an enthipial exchanger in the system. So we have to live with it.