Heat pump no longer available - legal question

It is not supposed to be legal advice either. But what if I buy a BMW and suddenly the engine no longer exists. Do I then have to take an Audi or pay the extra cost for the more expensive engine? There must be a legal basis for contracts, right? It is not about me wanting to be stubborn but why should I be willing to compromise now when the company itself is not?

Bring cake over (-;
(Reference to another thread) ...
I wouldn't give in a millimeter ... they should just pay the difference if they can't manage to pre-order

This is probably the typical case of impossibility according to the Building Code.

Leave out the cooling (is pointless anyway) and negotiate a deal with the electrical system because of it. End.

I see it differently. The cooling is brilliant and worth its weight in gold (of course it's not air conditioning, but the important 2 to 3 degrees go down, almost free during operation, and environmentally flawless :)).

I would rather go for a different manufacturer.

According to the homepage of Viessmann, the Vitocal 333 g is still available. I would call there myself.