Central ventilation system - is moisture recovery necessary?

Heat exchanger do you mean heat recovery? But I meant if I get a central ventilation system with heat recovery, whether I can retrofit an enthalpy heat exchanger (for moisture recovery instead of heat) after 1-2 years if needed.

I mean the heat exchanger, optionally with or without enthalpy. They always feel like hexagonal boxes that you insert into the controlled residential ventilation. You can replace them at any time.

Well, it should be easy to replace the original heat exchanger without enthalpy with a new heat exchanger with enthalpy within 1-2 years as needed. Thank you.

Okay, so it should be easy to replace the original heat exchanger without enthalpy with a new heat exchanger with enthalpy within 1-2 years as needed. Thanks.

Yes, exactly, it is even recommended because then the building drying is finished and you have the option to use enthalpy in winter and without in summer. Costs vary depending on the manufacturer. I know ranges from 600 to over 1000 €.

It's just the more expensive option. Retrofitting costs €800, taking the upgrade at purchase is about €400-500. You don't need to worry about construction moisture, it will go away with enthalpy as well.

It's just the more expensive option.
Retrofitting costs €800, taking the upgrade when buying is about €400-500.
You don't need to worry about construction moisture; it also goes away with enthalpy.

I didn't mean that you can't get the house dry (except that it might take a bit longer). But due to the drying time, you often might not need an enthalpy heat exchanger at first. And you can still decide in 2-3 years whether you need one or not. As already mentioned, depending on the circumstances, it might possibly never be needed permanently.
Everyone has to decide for themselves if they want to save the €300-500 compared to retrofitting.
But I want to point out again that you can still switch to it when retrofitting. In summer, you might even rather want to get moisture out...