Recommendations for air-water heat pump with integrated central ventilation

Hello,

we are planning the construction of a semi-detached house. KFW 55, 2.5 stories, approximately 155m².
For the choice of heating technology, I have decided on an air-to-water heat pump.
I personally do not find the decentralized ventilation (each room has an exhaust pipe in the exterior wall) aesthetic.
I like the option of integrated central ventilation much better.

However, I am happy to be proven otherwise! I am absolutely no expert.

Now my concern:
can someone recommend a reliable, efficient device?
My builder recommends a model from the brand Vaillant.
An independent consultation will take place next Thursday at a local heating company.

Best regards and thanks

Does Vaillant even have an integrated system? Why does it have to be integrated? The device itself is not the cost factor anyway, but the piping with labor.

As I said, I am absolutely no expert. I believe the one currently offered to me is the Arotherm from Vaillant. It does not have integrated ventilation. I would like an air-water heat pump with integrated ventilation, as this way I have no outdoor unit, and also no outdoor pipe for ventilation with a manual tilt switch in every utility room.

I do not have an external pipe in every room and still have heating and ventilation separated. And now?

But those are two different things. What you are looking for is an air-to-water heat pump with indoor installation (not a split unit with an outdoor unit). It draws the air through large openings but still from outside. The air is used to extract heat energy from it and is then cooled accordingly and discharged outside again. The heat is transferred to the underfloor heating and hot water storage.
A ventilation system is to be seen separately from this. It also draws outside air, but significantly less, continuously, and blows it into the living spaces or extracts used air there and directs it outside. With heat recovery, energy is then extracted from the exhaust air and transferred to the fresh supply air (purely mechanical, no heat pump).
There are devices that do both. Typically, these are exhaust air heat pumps that do not use outside air as an energy source but only the exhaust air from the house. That works effectively only in passive houses.
I would not want decentralized devices either, but centralized ventilation. However, that does not come for free.

Thank you for your explanation. You are right. That's exactly what I'm looking for.

An air-to-water heat pump without an outdoor unit and a centrally controlled ventilation system with a duct system inside the house.

Can someone recommend devices for this?