Energy Saving Ordinance 2014 - Gas boiler without solar?

For us, the current Energy Saving Ordinance applies. We have gas + controlled residential ventilation and barely managed it.

Does anyone have the standard chain ready, why gas does not comply with the Energy Saving Ordinance 2016?

I would always prefer controlled residential ventilation over solar thermal and photovoltaic systems because I don't like sitting in stuffy air and it should be good for the new building.

In my opinion, the gas price will remain stable over the next few years, while electricity rises. Thanks to lower demand and stable supply (y).

P.S. Heat pump technology is already ancient and extremely simple. If you don't trust the technology, then you should dispose of your fridge and freezer, as they use the same technology. Operation is actually cheaper, almost maintenance-free, and a chimney sweep is not necessary.
I believe you haven't seriously dealt with it yet and you don't want to.
By the way, we heat 300 sqm with a heat pump. Including hot water in the first year of use (which is usually rather expensive in terms of heating) for about €55-60 per month (5 people at a comfortable 22 degrees).
Gas boilers are extremely prone to failure from my own experience. In the last house, we definitely paid around €3,000 for maintenance and repairs over 10 years.
Now you have a negative report, are you switching to pellets?
What I want to say is that you have to deal with the subject yourself. But just because of prejudices (which also applies to the price of heat pumps), giving up your dream home? That would be stupidity.

If the concept we came up with with gas condensing boiler, underfloor heating, KLW is not feasible, then we will probably have to consider whether we even want to build at all and not rather choose an existing property. Building will become even more expensive because of that

I know how a heat pump works. I also know how a refrigerator works.
It's the same principle, but they are still completely differently constructed devices.
How many 20-year-old refrigerators do you know?
I also believe you that you can heat 300 sqm with a heat pump. The costs may also be correct. What kind of heat pump do you use? Air, brine, or water?
A gas heating system would simply be even cheaper.

Pellet heating systems are also not an alternative. The heating system is expensive and the pellet prices have also risen sharply.

You’re carrying a lot of "hearsay" and mistrust in your backpack.... maybe also a bit of resistance to learning?

If you absolutely want gas, YOU MUST submit the building application this year, otherwise it won’t work; the deadline is 12/31/15. But: even with controlled residential ventilation, only just KfW 70 can be achieved, as has confirmed to you.

By the way, this year we replaced our 20-year-old refrigerator with a new one; it was by no means broken. I guess you’re carrying the idea of an air-to-air heat pump around with your negative statements about electricity costs. This heat pump is sensibly and economically used only from KfW 40, better yet PH. If it’s installed in simple KfW houses, no wonder their residents end up stupid paying for electricity.

Rhenish greetings from the road