Heating system new construction (heat pump + stove + solar)

Thank you for the response.

Ok, then something different.

If you had the choice:
L heat pump
Ground source heat pump
Oil heating

Not from an ecological perspective.

Brine heat pump

Well, business management calculation.

Presumably, the oil heating system will win because of the currently low oil price. But the Energy Saving Ordinance probably only allows it if sufficient solar is included. However, I do not know that.

The question must therefore focus on the development of future prices of the energy source and whether and how it can be replaced.

An oil drilling rig in the garden... mmmm difficult. Photovoltaics on the roof, more possible.

Price development of energy sources: probably rather rising in the long run.

Photovoltaics as an investment probably falling, but you burn the surplus in summer. Then the pool with heating is worthwhile.

Presumably, the brine-water heat pump would at first glance be the biggest economic nonsense, but I would always prefer it to the air-water heat pump.

OK.

I understand how the brine works in winter. In summer, the surface is reheated by the sun.

If I now run the water in circulation mode through the ceilings in summer, what temperature does it have then, for cooling?
Isn't it even an advantage, since I bring the heat into the ground?

So if I can't avoid solar with OIL, it doesn't make sense to me. Because the sun shines when I don't need the heat. I see it with our photovoltaic system, which only pays off for other reasons.

You can hardly get below 25 degrees with the heat pump cooling in summer when it's around 30 outside... so it's rather not worthwhile without additional measures.