Kfw 458 - Heating system replacement - Disposal proof?

Hello.

A question about program 458 KfW heating replacement. So far, an oil heating system is installed and will be replaced by a connection to a heating network.

Does the removal and disposal of the old heating system and oil tanks need to be proven?
That is, professional disposal by a certified company? We would simply leave the system in place.

We are only applying for the basic funding of 30%, the climate speed bonus is not being applied for.

Regards, Christian

If you leave the whole thing standing without disposal, this inspection of oil storage, which occurs every few years, will presumably continue to have to be carried out. For us, it was recent and since we are also having a heat pump installed soon, we got into conversation with the inspector. He said they have to check the proper disposal on site ([check documents and make sure the oil tank etc. is really gone]) and forward this accordingly to the responsible authority, otherwise you would always be asked to have someone come for the inspection. Whether this really works like that in practice, I cannot say.

If you leave the whole thing undisposed of, this oil storage inspection, which is required every few years, will probably continue,

In fact, only very few tanks are (have to be) inspected. In the ground every 5 years, in the basement never (except larger than 10,000 liters). Exceptions in flood areas. I therefore simply left mine standing in the basement - since 1967 no inspection has taken place for the reasons mentioned above. You list the old oil heating for disposal on classified ads. Disconnect old pipes beforehand. Then dozens of scrap dealers will get in touch and even pay 50€ for the disposal. Otherwise, you do not need proof for the KfW. But you should talk to your energy consultant, who provides the corresponding declaration to the KfW and is liable.

In fact, only very few tanks are (have to be) inspected. In the ground every 5 years, in the basement never (except larger than 10,000 liters). Exceptions in flood areas.

I don't think it was about inspecting the tank itself, but rather the storage conditions, meaning whether there is a protective wall and if it is high enough, etc., in case the tank itself does not provide adequate protection, etc.
Our tank is neither underground nor larger than 10,000 liters and we are not in a flood area. I think we are also not in a water protection area, but I might be wrong about that, maybe that's the reason then.

Yes, no idea, maybe something regional. We received a letter saying that we have to have it inspected, including a list of companies we are allowed to choose from. It came from an authority of the district, and in the documents of the previous owners of the house, I had already seen the documentation of such an inspection with the note that the next inspection is to take place in 2024. Our tank is located in a room that adjoins the garage at the back, and is thus on one side virtually in the basement and on the other at ground level (on a slope). Maybe, strangely, it is therefore considered underground?

From which authority did that come, and is a legal basis named in the letter? This must exist and also be comprehensible for you.