BAFA - Funding: House contract before application submission?

(The date was set for a long time, but now we have received the message that prices will likely increase next week).

Hahahaha what a coincidence

As already mentioned above, the following sentence can be found:
„Als Vorhabensbeginn gilt der rechtsverbindliche Abschluss eines der Ausführung zuzurechnenden Lieferungs- oder Leistungsvertrages. Planungsleistungen dürfen vor Antragstellung erbracht werden.“

Now I have the following question: Does the start date refer to the conclusion of the "house contract" with the developer or the later contract conclusion between the developer and the heating company (if there even is one)??
So far, I have not been able to find anything on this...

The construction contract applies if a very specific heat pump is named in it. If, for example, only a model series is mentioned and the performance level is selected only after creating the heating load calculation, then the BAFA application must be submitted before this selection is finalized and before the general contractor orders the heat pump from the installation company.

Thank you very much. Did you get this information directly from Bafa?

In my house contract, the model series Arotherm from Vaillant is stated. Fortunately, it is also clearly stated that the type will only be determined after a heat demand calculation.

I hope everything goes through like that. Up to 17,500 euros is a lot of money...

Yes, I have already had a general contractor contract and have inquired in writing with the BAFA.