Local heat or air-water heat pump?

Since everything is inside an insulated shell, everything must be heated. Otherwise, the ground floor heats the basement as well and is then either too cold, or more heating power has to be pumped into the ground floor (inefficiently). A two-degree difference is acceptable. More is nonsense.

And with the size and KFW55 in the south, the costs with a heat pump per year are lower than the basic fee for district heating. So for me, the matter is also clear...

Edit: In that case, I would also put a photovoltaic system on the roof and rent it out warm. Remove individual room control so that the tenant doesn't do nonsense.

Edit: In this case, I would also put a photovoltaic system on the roof and rent it out with heating included.

Not tenant electricity as well! That is complex.

Remove the single-room control so the tenant doesn't do anything stupid.

He directly adjusts the flow rates. 100% guaranteed. I can say that from rental experience.

Not tenant electricity as well! That is complex.

It directly affects the flow rates. 100% guaranteed. I can say that from rental experience.

Yes - tenant electricity is not that simple. But first of all, the federal government has to have abolished the bureaucracy around it for half a year now. So something will have to start moving there, slowly. Alternatively, just send the electricity only through the heat pump meter, then it remains your electricity. You only sell "1x warm house".

And regarding the flow rates, you need a reasonable tenant or you just lock the distribution boxes. In some buildings the heating rooms are also locked...

And because of the flows, you need a reasonable tenant or you just lock the distribution boxes.

... and risk a rent reduction because the heating is not adjustable. It is mandatory that it can be adjusted by the tenant. Sure, you can do all that. But it would all be too complicated for me. The tenant should just use the low-maintenance local heat.

Thanks to you, photovoltaics are out of the question anyway.... but I think the trend is moving towards heat pumps.... my feeling has been telling me that all along. As a landlord, I could say... I don't care because the costs are borne by the tenant.... but when you read in other forums.... sometimes the costs are as high as with an old building... and since you are then tied to it for at least 5 years.... it gets difficult.

One more question: for KfW55 and the size, is 10,500 kWh for heating and hot water realistic?

Thanks to you!

Photovoltaics are out of the question anyway....

Why? Do you already have too much money?