Geothermal heating and domestic water, surface collector/deep drilling?

Hello!

We are currently planning to build a house, and that includes finding the right heating system.
We recently visited an installer near us, and he recommended a geothermal heating system.
We are planning a bungalow of about 120 m² including mechanical ventilation to achieve a nearly zero-energy house.

Our installer recommended a heat pump from KNV with direct evaporation and a ground collector. The house and drinking water should be heated with it.

Which brand would you recommend? Should we rather choose a ground collector (how many m²?) or a deep borehole (how deep?).

I saw that KNV and Ochsner use the refrigerant R407c and Heliotherm uses R410A.
Is there a difference?
I also saw that there are MODULATING heat pumps. Are these preferable? And why?
Oh yes, and last but not least, does anyone know the price of any brand? I couldn’t find prices for Heliotherm and Ochsner online.

Best regards
Daniel

The topic is very complex and cannot be separated from the overall package [Haus]. I would also always seek independent information.

Best regards

Hello,

regarding geoJETTING. I had not heard of it until now.
Do they offer it in Austria as well? Where can one find a company that does this?

Oops, I didn't expect Austria, I have to pass on that.

Hello,

we have recently moved into a Kfw 60 house with a geothermal heat pump (deep drilling) and controlled ventilation with heat recovery.

The heat pump itself is from Waterkotte, the AI1, with which you can even cool in summer. Two of my colleagues have had this for several years and are also very satisfied. I have only heard positive things about it so far.

The depth of a drilling depends on the living area and the insulation of the house. This is then calculated based on the parameters.

Hope this helps you.

Best regards Soundsurf