Manufacturer heating / controlled indoor ventilation wanted

Hello,

I am currently planning our single-family house... The electrical/automation part is more or less done... (+-170sqm without basement + large garage)
Now I wanted to turn to the topic of heating/controlled residential ventilation...

Since KNX will play a big role in our house, I would like to control the controlled residential ventilation via appropriate sensors...
The heating will not be connected because I think it can manage without me :P

There should be an air heat pump (does solar support make sense here?!) and a controlled residential ventilation with heat recovery in the house...
I have not spoken to the heating installer yet as everyone seems to want to promote their own "house brand"...

Which manufacturers offer the best price/performance for these two trades?!

Thanks

Do you want to control the controlled residential ventilation directly via the bus? There is not much choice, and the gateways with the provided functions are rather limited and expensive. It is easier to control the controlled residential ventilation with "traditional" KNX components. 0-10V and 230V actuators, a couple of temperature sensors, and whatever else you can think of. Then you are not tied to a specific manufacturer and can practically install any system.

I am not completely resistant to advice...

Temperature sensors are already built into the switches anyway... I can still imagine having humidity sensors and CO2 in one or another room...

What about the manufacturers? Which devices would you recommend?

Well, the interior looks 90% the same. I would take any manufacturer with an enthalpy exchanger that does not require special filters.

Zehnder was always highly regarded, then there would be Wolf/Brink, Helios/Vallox.

For the heat pump, it is initially important that it is dimensioned according to the heating load of the house, no buffer storage tank is installed, and that the heating surfaces in the house are very well planned. The heat pump should ideally be modulating. You can find many suggestions about this on the internet. The manufacturer is initially secondary. There is somewhere a list at [Bafa] that lists devices with efficiency and comparability, which should make the selection quite reliable.

You want an air-to-water heat pump, not an air-to-air heat pump. Solar thermal makes no sense, on the contrary. Photovoltaics are sensible and economical.

Slightly oversize the heat pump and [Controlled residential ventilation].

Temperature sensors are in the switches anyway... I can still imagine a humidity sensor and CO2 in one or the other room...

The ventilation cannot be controlled individually per room anyway. Room-by-room humidity values are of little interest for this trade. You only need one CO2 sensor centrally in the exhaust air to make use of the information. Ultimately, in a controlled residential ventilation system, the air throughput and the bypass control are interesting. Other than that, there isn’t much to control. You can take a look at the manual of the Zehnder KNX Gateway to get an impression.

Heat pump is exactly the same story. There’s not really much to control due to the inertia of the system.