Energy Saving Ordinance 2014 - Gas boiler without solar?

No, but which prices are you assuming? You still owe us the answer.

In my opinion, you have this effect "anyway and always" with a central controlled residential ventilation system with heat recovery. The (warm, fresh) air from the living room flows through overflow areas (hallway) to the exhaust area (e.g., kitchen or bathroom), is extracted there and then cooled in the central heat exchanger against the fresh supply air from outside. In an open living/dining/kitchen area, you have supply and exhaust air valves together anyway.

In my opinion, controlled residential ventilation systems are not naturally quiet, special demands then require special measures in the planning (rather smaller volume flows per valve, rather low flow velocities in the ducts and in the overflow valves [especially large gaps under the doors reduce the flow velocity but eventually render the purpose of a door absurd; however, there are alternatives] ...).

Building legally with gas heating according to the Energy Saving Ordinance (EnEV) 2016 calls for an architect and a creative energy consultant in my opinion. With a general contractor/developer/builder, that is rather unlikely to work out (exceptions prove the rule). IMHO gas is ideal for heating (of course with condensing technology and underfloor heating with low flow temperature), unfortunately the legislator wants us to heat with electricity. So that's what we do.

Last point: I cook with induction and haven't missed the gas stove at all since then. But that’s up to you ...

It is my job to know that; however, I should have phrased it differently and even better, not replying so briefly and shortly before an appointment.

It is always difficult – at least for me – to find sources which are not prematurely labeled as biased; like "the bread I eat, the song I sing". I therefore hope to have found a neutral explanation of the changes as of 01.01.2016 with the attached jpgs.

The most important changes to the Energy Saving Ordinance 2016 relate to

[*]Primary energy factor for electricity: 2.4 (from 1.5.2014) or 1.8 (from 1.1.2016)
[*]Reference technology: unchanged for residential and non-residential buildings,
but partially described more clearly
[*]Tightening from a system-technical perspective occurs via the general multiplier (0.75) on QP,REF from 1.1.2016
[*]Tightening of HT by an average of 20% from 1.1.2016
[*]Introduction of energy efficiency classes in the energy performance certificate and mandatory information for real estate advertisements
[*]Verification of certificates

If you look at how much more effort you have to make in the future to operate a single-family house with a gas condensing boiler, on the next slide you will see that this effort is not necessary when installing an air-water heat pump and also bear in mind that an air-water heat pump nowadays is purchased at roughly the same price as a gas condensing boiler – photovoltaic and storage systems are getting cheaper and cheaper – you will understand why I wrote that you will not succeed with gas. I can hardly imagine that from January 16 there will be many builders willing to bear this "extra" cost just to be able to heat supposedly "cheaply" with gas. Ultimately and taking all investment costs into account, gas is not really cheaper than electricity.

Renewable energies are subsidized and accordingly also required in new buildings, so that the targeted goal – to only allow passive houses by 2020 and only approve zero-energy houses by 2050 – can be achieved. With this goal, the classic gas condensing boiler must in my opinion become the loser, but still fulfill the requirements of the Energy Saving Ordinance for a while through heat pumps – for example domestic hot water or fresh water heat pumps.

Source: Energy Saving Ordinance 2014/2016 Overview, Innovations, Consequences. Brandenburg Chamber of Engineers March 2015, Dr.-Ing. K. Jagnow ♦ Braunschweig ♦ Magdeburg

Rhenish greetings

We were at Okal Haus and had a house calculated.
The surcharge from kfw 70 with gas to kfw 55 with heat pump was €9000.
The surcharge from kfw 70 with gas to kfw 70 with heat pump was still €4000.

Thanks for the graphics.
Now I can imagine something.
So the conclusion is that it works but is associated with additional effort.

e.g. under brine heat pump.