BAFA funding heat pump - deadlines?

Thank you very much for the answers. Isn't that complete nonsense? When funding for "renewable energies" is spent, it doesn't matter at all when a project starts on paper

As said, probably because the heating system itself had not yet been finalized.

I'm not sure. I can't say for certain because I didn't have the problem, but I think I've often come across the issue that especially with general contractor contracts, it depends on whether the exact heat pump is already specified in the contract or not.

Example:

1.
Contract house...
blablabla...
Heating technology: heat pump from the company Viessmann.

-> Still acceptable

2.
Contract house....
blablabla...
Heating technology: heat pump company Viessmann model 320a/yxz mod. with 2-7kw

-> No longer acceptable

...but as said, only from memory, might also be wrong.

That's what I mean. I strongly assume that this is the reason.