Subsidy for heat pump despite continued operation of existing condensing boiler

Do we still receive the full funding if we continue to operate our existing gas condensing boiler after installing an air-water heat pump and solar thermal system? On August 9, 2022, we submitted a funding application for the installation of an air-water heat pump and solar thermal system. We checked the box: "I am applying for funding for the following systems: Heating technology for the use of renewable energies including renewable energy hybrid heating systems." Now we are considering keeping the existing gas condensing boiler to heat more cost-effectively with gas at low temperatures. However, we are worried about losing the funding (35% for the air heat pump and 30% for the solar thermal system). This concern arises because the press always talks about the "replacement" of the old heating system in connection with the funding. Does anyone have experience regarding this? Can someone explain why we would still receive the funding?

Has anyone had experience with this? Can someone explain why we still get the funding?

The funding conditions clearly state "replacement". The old gas heating system must definitely be removed, otherwise it is subsidy fraud. Being a little pregnant is just as impossible as a partial replacement.

In the funding conditions it clearly states "Austausch".

The funding conditions clearly state "exchange."

Yes, that's correct. That is stated in the current funding conditions. However, we submitted our application before the extensive changes that have been in effect since August 15, 2022 (on August 11, 2022). Was the exchange also mandatory under the conditions at that time?

Was the exchange also mandatory according to the conditions at that time?

Yep.

And a few filler words on top...