Manufacturer trench collectors

Hello dear forum community,
I have already diligently used the search, but without any real results.

We are currently planning our single-family house (approx. 190m²).
At the moment, we are also dealing with the future heating system.

We have now received the tip to take a look at "Grabenkollektoren".
Although I find a lot of theory on the internet, I cannot find any manufacturers.

Can you name some manufacturers who offer this?
This post can also be linked accordingly.

I am looking forward to your answers.

Best regards
André

Hello,
The trench collector is extensively discussed in the pink forum. There are also tools and tables for this.
This type of collector is intended to be planned and built by yourself.
I did it this way too, and it already requires time, a plan, and helpers.

Thank you for the answer. However, I really don't have the time for that. Also, my site manager wants a certain guarantee for the installation. Then it will probably come down to an air-to-water heat pump.

An alternative suggestion would be geothermal baskets. But it also depends on the plot size and the soil.

So our property has a total size of about 800 sqm. Without the house, we have a remaining area of 400-500 sqm.

Would that still be enough? How does it look in terms of efficiency?

Search the internet for system collectors..

This provider will also do the work completely for you if desired.
These collections are designed either for V-trenches or slot trenches and require less space and excavation than the Slinky ring trench collectors, which you have to plan and lay completely yourself. (See pink forum)

However, with the offered collector, it then costs about €3,000-5,000 more than if you install it yourself.