Controlled residential ventilation in winter, dry air, what can be done about it

It also helps to hang up laundry instead of putting it in the dryer. In addition, in winter, I like to "air out" the bathroom into the living space after showering rather than out the window. Heating less also helps - but that is a bit too 1900s.

I want to have the enthalpy version offered directly instead of the Zehnder Comfoair Q350 TR for the above-mentioned reason.

How much more may the version cost?

Hmm actually nothing, but the usual surcharge is about 500-600.

Thanks for the info, I will have it offered and then pass on the information here. Retrofitting costs about €900.

Hmm eigentlich nichts

A membrane is indeed more expensive than a piece of sheet metal. I would find it quite fair to offer a regular heat exchanger at a lower price than one that allows water vapor to pass through via a membrane. Conversely, the enthalpy heat exchanger variant must then be more expensive. One can argue about absolute figures.

Usually, the simple cross flow heat exchangers also do not consist of just one piece of sheet metal.

Simple plate heat exchanger:



The same but as an enthalpy heat exchanger: