Possible house purchase - air-water heat pump possibly a money pit

I meant 120 thousand for around 550sqm as the land price, rather minimum. 120 per sqm is probably no longer possible. K.

There should still be a warranty on the house including [Technik].

Best regards in brief

The warranty is then: It gets warm. This will be a nerve-wracking battle with court proceedings. Argument: it was approved like that and that's that.

I could have guessed what was meant with 120 :-D

Hello,

The warranty is then: It gets warm. This will be a nerve-wracking battle with court proceedings. Argument: it was approved like that and that’s the end of it.

They at least have to prove the installation according to DIN. Otherwise, the heating technician will have a serious problem!

What is actually interesting at first is the installation spacing of the heating pipes and the flow temperature required to get the place warm. If, of course, some lightning brain has installed a 20-25 cm spacing, you will need a flow temperature of easily 50 degrees to heat the house. That is not possible with a heat pump, of course. That would be the case: rip out the heat pump and replace it with a gas boiler. But that’s really not worth it either. That will cost you around €10,000 (because the gas connection also has to be installed) and saves you €1,000 per year. ROI therefore 10 years. Doesn’t really make sense either...

Ergo: The electric heating will stay in.

Best regards,

Andreas

Thank you very much for all the feedback. I will have the corresponding documents requested. Who can then tell me the installation spacing and flow temperature to get the house to a certain temperature? When you write about a meter here: You probably mean the extra electricity meter for the heat pump, or do you possibly also mean the heat meter? This is supposed to be installed on the pump. Is there a difference whether the fireplace is included in the invoice or not? I have the impression that the fireplace was installed merely as a visual aspect. Have a nice weekend

I can only share one experience with you. Our children live in a similarly sized house with an air-to-water heat pump from [Junkers].

The heating installer apparently had very little experience with those things. February and March electricity costs were 450 euros. The son-in-law was frustrated, he hadn’t expected to give up gas. He gave the heating installer a hard time, asking him to finally send someone who knows about the system. There was no one in the company, not even the boss. So, he sent the [Junkers] factory service. The result was incorrect settings and installation errors.
After corrections according to [Junkers] specifications, it now runs much more efficiently. The problem was with the hot water preparation. The house has no solar thermal system for that. However, the heating ran in such a way that it produced shower and bath water purely with electricity. With four people taking warm showers in the household, that gets expensive. So, maybe it’s just poorly adjusted. Investigate, take someone with you who knows about such things. Karsten