New BAFA funding - Air-to-water heat pump with solar thermal

No drilling is allowed! Water protection zone

Did you actually inquire about this with the responsible authorities (lower water authority)? We were also told from all sides at the time that we could forget about it because we are in a healing spring protection area. However, it actually would not have been a problem.

Have you actually inquired with the responsible authorities (lower water authority) in this regard?

Yes, I did by phone. I received a short information sheet on the matter. Drilling is taboo, it is already stated in the textual determination. The information sheet contains a passage that I no longer remember verbatim... roughly, geothermal energy with surface collectors can be approved if the soil has a kf value of at least "X", this sealing layer can also be artificially created. It was phrased something like that. For example, I would have had to work with bentonite.

I think our planned air-to-water heat pump will even achieve 4.5

Yes, there are air-to-water heat pumps that can achieve that. The easiest way to get the subsidy

Nevertheless, it is still the case that the application for BAFA funding must be submitted before the start of the measure? So basically before the contract with a [GU] or house manufacturer has been signed, right?

Still, the application for BAFA funding must be submitted before the start of the measure, right? Basically, before the contract with a general contractor or house manufacturer has been signed, isn't it?

I would also be interested to know who has experience with this. The regulation of the application before a contractual agreement for the installation of the heat pump already applied before the amendment of the funding. Did anyone possibly use it last year with a "normal" contract with a general contractor? Usually, a heating system and planning are included there. But for the funding, an application must be submitted before signing, although certainly none of the details required for the application of the heat pump are known at that point... Vicious circle? Do the general contractors negotiate and initially exclude the heat pump from the contract, of course with costs fixed in advance, and then make a separate contract after planning and application with the BAFA?

Can someone perhaps estimate from experience whether a brine heat pump now pays off with the 35% funding compared to an air-to-water heat pump? Probably still difficult with a probe, but with ground surfaces/ring piston collector it might now amortize due to the higher annual performance factor, right?

Still, isn't it the case that the application for BAFA funding must be submitted before the start of the measure? So basically before the contract with a general contractor or house manufacturer is signed, right?

I can't say anything about the general contractor; I had already assumed that the contract with the general contractor applies there. We are building with individual contracts and I assume that the commissioning of the heating engineer is relevant, so the date on the construction contract with him!?