Energy Saving Ordinance 2014 - Gas boiler without solar?

It is a standard T9 brick with 36.5 cm masonry, triple-glazed windows. No mineral wool, no roof insulation necessary. We will probably insulate the roof anyway so that the heat stays out longer in the summer.

A compressor is a compressor

By the way, in the last 20 years (I haven't lived alone that long yet) I have never thrown away a refrigerator. We have also never had one break down. Replacement of an approximately 20-year-old chest freezer with a new model because we needed more space. In the garden shed, a device about 15-18 years old for summer parties.

We ourselves use a brine heat pump. It was suitable for the ground and the size of the house.

What do you think the gas heating costs you compared to the heat pump? Both in terms of purchase, maintenance, and consumption – with your statements you must have done a calculation.

How do you mean that a brine heat pump is cheaper than a gas heating system? That would be a surprise.

It is a normal T9 brick with 36.5 cm masonry, triple-glazed windows. No mineral wool, no roof insulation necessary.

However, we will probably still insulate the roof so that the heat stays out longer in the summer.

I would have thought you would have insulated to the extreme.

How do you mean that a ground source heat pump is cheaper than a gas heater? That would be a surprise.

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

My idea was therefore to extract the air warmed by the fireplace in the living room and to warm the cold supply air through the heat exchanger of the ventilation system and distribute it throughout the house.

This effect, in my opinion, you have "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 against the fresh supply air from outside in the central heat exchanger. In an open living/dining/cooking area, you have supply and exhaust vents together anyway.

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

Building legally with gas heating, in my opinion, calls for an architect and a creative energy consultant. With a general contractor/developer/building contractor, that will hardly work (exceptions prove the rule). IMHO, gas is ideal for heating (of course with condensing boiler and underfloor heating with low flow temperature), unfortunately the legislator wants us to heat with electricity. So we do that.

Last point: I cook with induction and haven't missed the gas stove in the slightest since. But that's for you to decide ...

Dear people.
Do you know for sure that since the Energy Saving Ordinance 2016 no more gas heating systems are approved, or is that just hearsay?

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

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

The most important changes to the Energy Saving Ordinance 2016 concern

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

If you look at how much more effort you have to invest in the future to operate a single-family house with a gas condensing boiler, you will see on the next slide that this effort is not necessary when installing an air-to-water heat pump, and if you also keep in mind that an air-to-water heat pump nowadays is purchased at about the same price as a gas condensing boiler – photovoltaic and storage systems are becoming increasingly affordable – you will understand why I wrote that you will not make it with gas. I can hardly imagine that, starting in January 2016, there will be many builders willing to bear this "extra" cost just to supposedly heat "cheaply" with gas. All in all and taking all investment costs into account, gas is not really cheaper than electricity.

Renewable energies are being promoted and therefore also required in new construction in order to achieve the targeted goal – by 2020, only passive houses to be allowed and by 2050 only zero-energy houses to be approved. With this goal, in my opinion, the classic gas condensing boiler must become the loser, but through heat pumps – e.g., domestic hot water or fresh water heat pumps – it will still be possible to meet the requirements of the Energy Saving Ordinance for a while.

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

Rhenish greetings