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

Exactly, that's why you couldn't answer my question either.

Which question? How many systems I have already planned? But I did answer that.

Gas condensing boilers and heat pumps are two completely different principles of heat generation. This results in partly different requirements and necessities. To limit it solely to the flow temperature is simply wrong. Moreover, it is not the flow temperature but precisely the heating medium temperature difference that is decisive. For heat pumps, this is a very important criterion, for gas condensing boilers less important. On the contrary, here somewhat higher flow temperatures are even advantageous!

That's clear, similar to electric cars and gasoline engines. Still, a high flow temperature ruins the seasonal performance factor of a heat pump. And as you yourself write, it doesn't matter to a gas condensing boiler, on the contrary, fire is naturally warmer than 35 degrees.

Besides, I didn't want to limit it to the flow temperature, but to give an example of misdimensioning. For a heat pump, the flow temperature is decisive for efficiency.
Here I would be happy if you could write something about faulty planning of a gas condensing boiler. I would be interested to know what can go wrong there.

Only the real heat generator effort number is a comparative criterion, as far as energy balances are concerned.
For gas condensing boilers always > 1, since the actual consumption is always greater than the demand. For heat pumps < 1, since by using environmental energy consumption is less than the demand. For direct electric = 1!
For gas condensing boilers, this number is determined by forming the quotient of consumption at the meter and the actual amount of energy used for heating and hot water (measured with a heat meter).

So practically for a heat pump the reciprocal of the seasonal performance factor?

See my previous post. An average value from existing buildings, new builds (energy saving ordinance up to passive house).

Best regards.

Also here, I am a layman, still don't understand this average value. We are mainly talking about new builds here, so at least energy saving ordinance. Depending on size, the direction should actually be around 8 MWh or even smaller, right?! What use is an average from existing buildings for new builds?

And honestly, €, answers like that help. Heretical questions apparently don't only get on my nerves.

.... Heretical questions, apparently not only bothering me on s***

Understandable, since you have no professional training in the field where you present yourself as an anonymous advisor! In forums, by the way, this is not uncommon. Self-presentation, overestimation of one's abilities ala'coleur! There is talk, speculation that bends the beams, liability is of course assumed for nothing, since the advisor is anonymous! Only naive and cheap people actually fall for such advice! They are therefore quite entitled to the tuition fee!

Best regards

Hello €uro

Understandable, since you have no professional training in the field where you present yourself as an anonymous advisor!

You should also read posts instead of just complaining and destroying any discussion with 08/15 standard statements. Perlenmann has always emphasized being a layman. Unfortunately, you did not answer his questions regarding the diagram you posted, even though several other users would certainly be interested. Unfortunately, nothing comes from that.

Then just stop writing here in the forum.

.... Unfortunately, you did not answer his questions about the diagram you posted, although certainly some other users would be interested in it...

The truly interested parties have long since contacted me. Therefore, I gladly leave the remaining rest to arbitrary use!

best regards

@€uro

OK, for me it is clear that you are here solely for the purpose of customer acquisition. You are not interested in the exchange of information or added value in the sense of an internet forum.

Your acquisition tactic consists of first creating confusion, then generously offering help, then discreetly providing it via PM (or not), and finally hoping that someone becomes a paying customer. "The rest" can remain ignorant.

You are welcome to do so. I don’t care. I only ask you to no longer respond to my posts in the future. Thank you.

klblb

...OK, it is clear to me that you are here solely for the purpose of customer acquisition. You are not interested in exchanging information or providing added value in the sense of an internet forum....

Mistake, of course, like every self-employed person, acquiring customers is important to me. Or do you really believe that, for example, a construction expert is just a healer? When professionals participate in forums, it is surely always also about acquisition, anything else would be completely unrealistic. I have been able to help many users from the forum so far, naturally for a fee! No one has ever been harmed by this.

... and ultimately hope that someone becomes a paying customer....

Anyone among the professionals who understands a bit 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.

...The rest" may remain dumb....

The vast "rest" is usually dumb, and pills mostly don’t help! As an expert witness, I encounter cases almost daily with excessive consumption costs, where people hope to make up for what was initially missed. Usually doesn’t work, at best cosmetic within a limited scope. Therefore, with my contributions I primarily focus on prevention, not on subsequent, imperfect healing! Truly valuable things are simply not available for free, unless you live in socialism.

Best regards