Heating via ventilation with heat pump

Did the sauna also run on heating electricity? Well, that kind of stove really uses a lot. Karsten

Yes, it seems unbelievable to me, since the cooling performance of the air-water heat pump is a joke anyway. You can't achieve something like that with 1 kW cooling capacity. Household electricity is of course individual, Grandma's old freezer is enough. Regular sauna visits also take their toll.

Here is an excerpt. I hope that's okay. I will definitely ask if there is a plausible explanation. Mainly because I want to know. Actually, I have practically already locked down the house. What would be a realistic magnitude? Just so I can argue better. I had already suspected him of tapping the cheaper heating electricity for something, e.g., the washing machine. But probably even that wouldn't explain the consumption. And then the household electricity would have to be relatively low in return. What could be the reason for the high consumption? I somehow have no explanation.

That's quite a figure! I would generally advise against it. If it absolutely has to be done: go down 40k€ on the price with the justification of wanting to implement a new heating concept. That means removing the screed, installing underfloor heating, and then choosing the type of heating. How is hot water prepared?

Well, hot water is prepared with a heat pump.