Heating type for new construction - Which is the best?

I think, however, that with photovoltaics you could achieve a certain degree of self-sufficiency with the air heat pump, right?

I thought so too, until I realized that I needed electricity from the photovoltaic system for the air-water heat pump exactly when the sun was hardly shining - in winter.

Or is the efficiency of the systems nowadays sufficient to generate enough electricity even in winter? It’s not about solar thermal energy, but photovoltaics, which is a small difference.

Does anyone have experience with this? The question partly arises from a suggestion to switch from an air-water heat pump to deep geothermal energy, and to invest the money for drilling and the brine-water heat pump better in a photovoltaic system...

Ok. So photovoltaic is out, at least without an expensive battery buffer. Does anyone have experience with an air-to-water heat pump and solar thermal energy? In summer, the air-to-water heat pump could be completely idle.

No experience, but logical thinking. 1. A heat pump is a device that is most efficient at the lowest supply temperatures. 2. Solar thermal provides high temperatures. 3. Few heating engineers deal with it intensively, and that should be done. 4. Hot water can only be used for one thing: hot water. 5. In summer, photovoltaics deliver electricity, which can then be used by the heat pump for hot water. 6. If enough hot water is available, you can do more with the electricity, if necessary sell it. 7. As above, the heat pump requires good planning, no matter which one. 8. This includes a properly designed underfloor heating system. 9. If your heating load is below 5KW at design temperature, there is a good opportunity for self-performance.

From our experience, I can only give you the advice:

Get it in WRITING! No one suddenly wanted to remember verbal promises with us...

Or just ignore the building authority, build whatever you want and hope that no one complains during the construction period. Once you're inside, they can't make a big fuss over minor issues anymore.

Many greetings,

Andreas

Speaking from the experience of a buyer: I would never never never never never buy a property where I can already see as a layman that the building application was fundamentally deviated from. "What else might he have changed? Fire protection? Structural integrity? Insulation/airtightness?"

Bureaucracy is usually annoying. But building your own home without legal certainty is too.


No, better not....

Id clear Oh man, there are specialists here In the energy saving ordinance calculation, components are calculated with U-values, whether you then do the required heating load with an air-water heat pump or a gas boiler is in my opinion totally irrelevant. And just because later on (when you have clarified the whole heating concept with the heater) you are undecided, you wouldn’t buy a house, I think that is really far-fetched what some people say here

In the energy saving ordinance calculation, components are calculated with U-values; whether you then supply the required heating load with an air-to-water heat pump or a gas boiler is, in my opinion, completely irrelevant.

Besides the quality of the building envelope, the primary energy demand of the building is relevant. And this results, in addition to the envelope quality, from the type of heating. Keyword: primary energy factor.