Nilan ventilation system with controlled heat recovery

It also depends on whether it is a very new building that is still drying. Then a higher humidity is normal, in subsequent years it would look different.

Of course, no one is forcing me.

I am looking for experience from property owners who have been living with a system for a longer time.

They talk about 30-60% humidity in the optimal case, I found 45% for the winter (in summer the value is higher) good in terms of value.

So 30 % RH would be perceived as uncomfortable by many. Generally, the optimal range is given as 40 % to 60 %.

We have a system with moisture recovery, and I find this very pleasant. I do not see a risk of mold; after all, there is ventilation and only (a part of the) moisture is recovered, nothing accumulates. The heat recovery does not make the house warmer, but only less cold.

Yes, you are in the right place here when it comes to experiences spanning several years. Many have installed ventilation systems in the forum.

And in winter, so not what is currently prevailing outside but indeed in winter.

Are the 30% actually a permanent condition without moisture recovery?

Except, as Alex writes, it is a 1-2 year old house, where there is still plenty of construction moisture, but from about the third year onwards you have the very dry air and everything that goes with it.

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

For me it would include a Nilan comfort 300. Could you also buy it with moisture recovery or retrofit it? Does anyone know and what would be the additional costs?

Or build without a ventilation system?
Then not kw40 but kf55 or is the system already needed there as well?

It's true that you can't control the dosage, but enthalpy exchangers are not miracle workers either. They can only absorb and release a certain amount of moisture from the air.

So to speak, the air is only slightly humidified when it comes in dry.

This creates a healthy indoor climate and still dehumidifies.

With Nilan, no enthalpy exchanger is offered. I would ask if they can offer you something else. The additional cost is about 1000 euros.

Building without controlled residential ventilation is even worse than without moisture recovery.

It's your decision.