ᐅ New Single-Family House Construction (KFW70) / Aerated Concrete vs. Sand-Lime Brick / Which Material to Choose?

€uro schrieb:
Exactly, that’s why you couldn’t answer my question.

What question? How many systems I’ve already planned? But I did answer that.

€uro schrieb:

Gas condensing boilers and heat pumps are two completely different principles of heat generation. This leads to partly different requirements and necessities. Limiting the discussion solely to the supply temperature is simply wrong. Furthermore, it is not the supply temperature but specifically the temperature difference of the heating medium that is decisive. For heat pumps, this is a very important criterion, while for gas condensing boilers it is less significant. On the contrary, slightly higher supply temperatures are even advantageous here!

That’s clear, similar to electric cars and gasoline engines. Still, a high supply temperature ruins the annual performance factor of a heat pump. And as you yourself mentioned, it doesn’t matter for a gas condensing boiler; in fact, fire is naturally warmer than 35°C (95°F).

Besides, I didn’t want to limit the discussion to supply temperature, but rather give examples of incorrect system design. For a heat pump, supply temperature is indeed crucial for efficiency.
Here I would appreciate it if you could write something about bad system design for gas condensing boilers. I’m curious what can go wrong there.

€uro schrieb:

Only the real heat generator performance factor is a comparative criterion when it comes to energy balances.
For gas condensing boilers it is always > 1, since the actual consumption is always greater than the demand. For heat pumps it is < 1, because by using environmental energy the consumption is less than the demand. For direct electric heating = 1!
For gas condensing boilers this factor is calculated by dividing the consumption recorded at the meter by the actual useful energy amount for heating and domestic hot water (measured with a heat meter).

So basically, for a heat pump it’s the inverse of the annual performance factor?

€uro schrieb:

See my previous post. An average value from existing buildings and new constructions (Energy Saving Ordinance up to Passive House standard).

Best regards.

Even here, I’m a layman and still don’t understand this average. We are mainly talking about new builds here, so at least the Energy Saving Ordinance standard. Depending on size, values around 8 MWh or even less should be realistic, right? What good does an average including existing buildings do for new builds?

And honestly, €, answers like this are helpful. Bold questions don’t seem to trouble only me.

Perlenmann schrieb:
.... Heretical questions, apparently not only bothering me

Understandable, since you have no formal training in the field where you present yourself as an anonymous adviser!
By the way, this is not uncommon in forums. Self-promotion, overconfidence of every kind! People argue, make assumptions to an excessive degree, and of course, no liability is accepted for anything because the adviser is anonymous!
Only naive and cheap-seekers actually fall for such advice! They can be expected to pay the price for their mistakes!

Best regards

Hello €uro

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

You should actually read the posts instead of just complaining and killing any discussion with generic standard statements. Perlenmann has always emphasized being a layperson. You didn’t answer his questions about the diagram you posted, even though I’m sure other users would be interested. Unfortunately, nothing comes from that.

Then just stop writing here in the forum altogether.

Musketier schrieb:
.... You unfortunately did not answer his questions about the diagram you posted, although surely several other users would be interested...

The truly interested parties have already contacted me. I will therefore gladly leave the remaining to arbitrary use!

Best regards

@€uro

Okay, for me it is clear that you are here solely for the purpose of client acquisition. You are not interested in exchanging information or providing added value as expected in an online forum.

Your approach to acquisition seems to be to first create confusion, then graciously offer help, which you then provide discreetly via private message (or not), and ultimately hope that someone becomes a paying customer. "The rest" can remain uninformed.

You’re free to continue this way if you wish. I don’t mind. I just ask that you no longer reply to my posts in the future. Thank you.

klblb

klblb schrieb:
...OK, for me it’s clear that you are here purely for client acquisition. You are not interested in exchanging information or providing value in the sense of an online forum....

That’s a misconception. Of course, like any self-employed professional, client acquisition is important to me. Or do you really think, for example, that Bauexperte is just some kind of miracle worker?
Whenever professionals participate in forums, it almost always has something to do with client acquisition; anything else would be completely unrealistic.
So far, I have been able to help many forum users, naturally for a fee! No one has been harmed by this so far.

klblb schrieb:
...and ultimately hope that someone becomes a paying customer....

Anyone who understands even a little about the overall business won’t bother with forums otherwise.
Unfortunately, there are only a few people who look beyond their own perspective! Otherwise, the forum would be flooded with professionals.

klblb schrieb:
...The rest can remain ignorant....

The vast “rest” are usually ignorant; even medication rarely helps in such cases! As an expert witness, I encounter nearly daily cases with excessive consumption costs, where people hope to catch up on what was initially missed. That usually doesn’t work – at best, you get limited cosmetic fixes.
That is why my contributions primarily focus on prevention, not on imperfect remedies after the fact!
Truly valuable knowledge is simply not available for free, unless you live in socialism.

Best regards