Construction costs are currently skyrocketing

This belongs to 15 farmers who process 35 tons of biomass there daily... Politically very much welcome here :/

Try talking personally on equal footing with one of the operators about what he thinks will happen in 10 years.
But it is also clear: if oil becomes more expensive, biomass production will also become more expensive - as will electricity.

You can simply install 2 empty conduits and a 5x2.5 cable for the system.
Then you can switch to an air-water heat pump anytime without major reconstruction.

Regarding the heat pump:

Ordered in November, hopefully coming in August

Vaillant information according to neighbors: no more this year
Information Kern-Haus to a neighbor who wants to start now: at least 12 months delivery time for the pump should be planned

Then I was lucky with my seven months.

On the topic of heat pumps:

Ordered in November, hopefully arriving in August

Vaillant information according to neighbors: there will be no more this year
Information from Kern-Haus to a neighbor who wants to start now: plan at least 12 months delivery time for the pump

I had noted two possible brands for the ground-source heat pump in the construction service description. Vaillant and Bosch. Bosch was ordered. I asked whether it might be possible to switch to Vaillant if it could be obtained earlier. However, they are not accepting any more orders this year... Then a silly question to those who know each other. For example, at the heating discount store there is a Vaillant ground-source heat pump (the same as in the construction service description) with a delivery time of a few days. But the heating installer does not order from there. What could be the reasons for this?

long-term contracts with his wholesaler. Payment terms. Bad experience in warranty cases. And from my own experience I can say that these internet discounters often do not actually have the items available. They mostly just order from the same wholesaler (there are not that many).

I probably should really take a look at Poland, it's not that far from here.
The air-to-water heat pump is from Viessmann Vitocal 222-S, 13.7 KW

13.7kw?!?
What do you want to heat with that?