New single-family house (KFW70)/aerated concrete vs. sand-lime brick/what to use?

....as long as a kWh of gas costs only about a third of a kWh of electricity, the air heat pump has to really pull out all the stops to recoup its investment costs....

An air heat pump does not require 2...3 thousand euros in connection costs With gas condensing boilers and air heat pumps, the investment costs are therefore usually on par! With an air heat pump you can cool, with a gas condensing boiler you cannot

...And the nasty thing: the colder the air outside gets and the more urgently you need the heating output, the worse the efficiency of the air heat pump becomes. This is often corrected by an electric heating element, which causes costs to explode completely....

How pointless to do that, if at all, in well-planned systems it accounts for < 1% of the annual heating energy demand! Trivial in the overall balance.
In new buildings with gas condensing boilers, you usually have to compulsorily buy an uneconomical solar thermal system for hot water, how horrible
With gas condensing boilers, the consumption is always higher than the demand, with air heat pumps it is the other way around

v.g.

You don’t get anything of real value for free, unless you live in socialism. Regards.

What exactly was that supposed to mean?

An air heat pump does not require 2...3 T€ connection costs. With gas condensing boilers and air heat pumps, the investment costs are usually on par! You can cool with an air heat pump, not with a gas condensing boiler.

Hi
The gas connection is laid together with other connections in new buildings, resulting in a cheaper price due to joint excavation work. There is a promotion at my building site with 950 EUR for the gas connection; without the promotion, a maximum of 1500 EUR for the gas connection alone.

How pointless, if at all, that accounts for < 1% of the annual heating energy demand in well-planned systems! Small potatoes within the overall balance.

Depends on the length and coldness of the winter. And whether 1% is enough, I doubt. Even in well-planned systems, an annual figure of 3 is hard to achieve. And you need at least that to keep up with gas.

In new buildings, you usually have to compulsorily buy an uneconomical solar thermal system for domestic hot water with gas condensing boilers, how awful

The only downside, where there is light, there is also shadow. However, these systems have almost no wear or cheap spare parts. They can pay off in the long run since the sun shines for free.

With gas condensing boilers, consumption is always higher than demand; with air heat pumps, it is the opposite.

v.g.

But electricity is at least three times as expensive as gas. Naysayers could claim—and indeed have claimed—that heat pumps are a marketing tool of the energy regulation, since they can no longer make a business with night storage heaters. The customer pays the same for consumption but needs more technology and more things can go wrong. And according to Murphy’s Law...

I believe you are not aware of some things. A heat pump is significantly more robust and also requires much less maintenance than a gas condensing boiler with a solar thermal system. Consider how often a refrigerator breaks down and how often it is maintained. In my opinion, heat pumps are the only way to avoid using fossil fuels in the future, and for that, a well-insulated building combined with an efficient heating system with low energy demand is needed. And here, heat pumps are currently simply state of the art, because no other heating system currently achieves such efficiency at "low" investment costs.

Actually, the topic should be settled, but honestly, I don't buy it. Apparently, I'm not alone in my opinion after all; Musketier understood me anyway.

Where are your helpful answers? You didn't even manage to answer my questions. So how helpful is what you write in this forum? Instead, I have to be labeled as an "anonymous advisor." €, you should ask yourself what kind of forum this is! How many "building experts" are there here? I think you should switch to the other forum, because free cheese is only found in a mousetrap. But I can't imagine that your style (for acquisition) is more appreciated over there?!

For me, as I understand it, this forum is a forum "by users for users." So ANONYMOUS ADVISORS naturally share their experiences without liability. What you do, I do not see as help or advice, but merely as a crude advertising ploy.

If I am mistaken in my opinion, then I ask for my account to be deleted.

Quote: Whoever among the professionals understands a little about the business as a whole will hardly bother with forums. Unfortunately, there are only a few who look beyond their own plate! Otherwise, the forum would be flooded with professionals.

Oh, as I said, in the other forum cheese is rarely free, but there you still get answers from experts!

The majority "rest" is mostly dumb,

Sorry, the customers who fall for your scheme are dumb.

Occasionally, the free tips do work:

How pointless, that if done at all, well-planned systems cover less than 1% of the annual heating energy demand! Peanuts within the overall balance. In new buildings, you usually have to buy an uneconomical solar thermal system for domestic hot water with a gas condensing boiler, how bad. With gas condensing boilers, consumption is always higher than demand; with air heat pumps, it's the opposite.

How €uro writes its articles can be seen in this nice example https://www.hausbau-forum.de/threads/fliesenbemusterung-erhebliche-preisdifferenzen.8753/