Good brine-water heat pump and controlled residential ventilation combination

I wanted to ask which combination you would recommend of brine-water heat pump and [Kontrollierte-Wohnraumlüftung]? We are building a 140 sqm bungalow next year and wanted to install a brine-water heat pump (deep drilling) and [Kontrollierte-Wohnraumlüftung].

That is a philosophical question. For our house, we went with the complete Nibe program (Nibe S1155-6 and Nibe ERS 10-400). Communication via Uplink as a software interface and thus absolutely certain that the BAFA will fund it. I chose the Nibe S1155 because the volume flow can be very low here (under 300l/h), so that the water storage tank for a fresh water station can be layered with ease and, if necessary, a heating circuit mixer can be dispensed with if the volume of the heating system is smaller. If the BAFA also accepts KNX, EnOcean or similar as an interface, then various other combinations are also possible. It hardly matters whether you opt for Nibe (or alpha innotec, Novelan), IDM, or others as a brine-water heat pump. What would be important to me personally is a good COP and that the brine-water heat pump is modulating as well as having a good low load limit. The rest is no rocket science anymore. For controlled residential ventilation, Zehnder or Maico are often mentioned as manufacturers. If we had not chosen Nibe, it would probably have been a Zehnder Q350.

I wanted to ask which combination of ground-source water heat pump and controlled residential ventilation you would recommend? We are building a 140 sqm bungalow next year and want to install a ground-source water heat pump (deep drilling) and controlled residential ventilation.

With the ground-source water heat pump, the manufacturer hardly matters. Off the top of my head, I can't think of any manufacturer that consistently receives negative feedback about their heat pumps. Make sure that the heat pump modulates and has as low a modulation limit as possible. I can unreservedly recommend Nibe, Alpha Innotec (basically Nibe), and Stiebel Eltron.

For the ventilation systems, I would suggest Zehnder or Maico.

This is a philosophical question. For our house, we went with the complete Nibe program (Nibe S1155-6 and Nibe ERS 10-400). Communication via Uplink as a software interface and thus absolutely certain that BAFA promotes this. I chose the Nibe S1155 because the volume flow can be very low here (under 300l/h), so that you can very comfortably layer the water storage for a fresh water station and possibly do without a heating circuit mixer if the volume of the heating is smaller.

If BAFA also accepts KNX, EnOcean or similar as an interface, then various other combinations are also possible. It hardly matters whether you use Nibe (or alpha innotec, Novelan), IDM or others as a brine-water heat pump. What is important to me personally is a good COP and that the brine-water heat pump is modulating and has a good lower power limit. The rest is no longer rocket science. For controlled residential ventilation, Zehnder or Maico are often named as manufacturers. If we had not chosen Nibe, it would probably have been a Zehnder Q350.

Are both loud? And have you taken any noise-reducing measures?

Does anyone have experience with Bosch products (Sole-Wasser-Wärmepumpe and Kontrollierte-Wohnraumlüftung)?

Are both loud? And have you made any noise reduction measures there?

Unfortunately, we have no experience yet, as construction at our site only starts in September. However, we will work with silencers in the controlled residential ventilation system to make the system as quiet as possible overall. Bosch is formerly Buderus, maybe you will find something on that. I found it rather unsuitable for the brine-water heat pump, as it modulates quite highly (if I still remember correctly).