ᐅ New Construction – Decentralized Ventilation Without Ceramic Heat Storage

Hello,
I am building a KfW 55 solid construction house and am still looking for a suitable decentralized ventilation system for the bathroom and bedrooms. (Possibly later retrofitting in the open-plan living / dining / kitchen area – manual ventilation is quite feasible there for now since my wife and child are at home...)
Devices with alternating fan direction, i.e., those with ceramic heat storage, are not an option. Mainly due to poor air filtration and, in my opinion, technically inferior heat recovery.

Does anyone in the forum have recommendations for a good unit?
During my internet research, I came across the Zehnder Comfospot, for example. Has anyone had experience with this?

Thanks in advance for your feedback.

Regards

What are the disadvantages of centralized systems? I personally use a decentralized inverter from Sevi.

Heat recovery works reasonably well, and power consumption is quite low (our household electricity costs are around €30, and the units run all day). Noise level is borderline acceptable (but you will likely experience this with any system).

Take a look at BlueMartin or Halmburger – we were able to see the latter in operation, and it was also fine. Both are cross-flow units. Bayernlüfter is also cross-flow, but back then the air volumes seemed small.

From my point of view, the high costs and long ducts are the main issues. Thank you for your recommendation. Does anyone have experience with the Zehnder unit or know if it can be operated not only manually but also controlled by CO2 levels?