2 offers for air heat pump

Wikipedia® is not a verified source; anyone can write whatever they like, and in very rare cases do the statements written there stand up to verification.

Well, Wikipedia is certainly not that bad. Wikipedia is quite good, especially because anyone can correct articles.

That is – with all due respect – nonsense. It can certainly be debated whether the use of an air-to-water heat pump is sensible or not; denying it its function certainly does not belong to that.

An air-to-water heat pump no longer works at too low temperatures. That is unfortunately a fact. The temperature specifications vary (Wikipedia: 0°, I have also heard: -3°). Anyway. If in an air-to-water heat pump only the built-in electric heater is heating with electricity, then at that moment it is no longer an air-to-water heat pump, right? By the way, I personally know two cases where the air-to-water heat pump gave up last winter. One was an architect’s house. The other was one of Viebrockhaus. The Viebrockhaus house owner had to retrofit an electric heater. By the way, Viebrockhaus said the heating system had a software bug. I say: it was so cold that the air-to-water heat pump no longer worked. The heating simply could no longer raise the temperature of the heat source enough.

The decision in favor of a geothermal heat pump always decisively depends on the soil conditions and the associated costs – and – by the way – the manufacturer’s suggested values are rarely achieved. The decision in favor of an air-to-water heat pump, on the other hand, is made for pragmatic cost reasons. Both decisions, in turn, take into account the move away from fossil fuels.

I totally agree with you. However, the move away from fossil fuels should not become a thoughtless dogma. Not to mention that the electricity the air-to-water heat pump needs mostly comes from coal and lignite power plants in Germany ;-)

Despite all the discussion and your support for gas condensing boilers, every builder should keep in mind that all the aforementioned systems have advantages and disadvantages. Therefore, the rule applies: if the builder is not sure, he should stick with gas combined with underfloor heating and calmly wait and watch the development of the renewable energy market. That way it will all work out ;)

That is very true :-) What a wise moderator has spoken here ;-)

By the way, there is supposed to be a new generation of heat pumps soon that will be powered by gas. In addition to generating heat for heating and hot water, a generator will produce electricity and feed it into the grid. This is intended to give these systems an efficiency similar to that of a gas condensing boiler. I find it quite interesting, but it is still a relatively new topic.

And you can also plan a fireplace or stove, which you can additionally heat in winter and which warms up the rooms...???