ᐅ Energy Saving Regulation 2014 – Gas Boiler Without Solar?

It is a standard T9 brick with 36.5 cm (14.4 inches) masonry and triple-glazed windows. No mineral wool insulation and no roof insulation are necessary.

However, we will probably still insulate the roof to keep the heat out longer during the summer.

nordanney schrieb:
A compressor is a compressor.

By the way, in the last 20 years (I haven’t lived alone that long), I have never thrown away a refrigerator. We have never had one break down either. We only replaced a chest freezer that was about 20 years old with a new model because we needed more space. There is a device around 15-18 years old in the garden shed used for summer parties.

We use a brine heat pump ourselves. It made sense considering the ground conditions and the size of the house.

What do you think a gas heating system costs you compared to a heat pump? Considering the purchase price, maintenance, and consumption – with your statements, you must have done some calculations.

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

merlin83 schrieb:
It's a standard T9 brick with 36.5cm (14.4 inches) thick masonry, triple-glazed windows. No mineral wool insulation, no roof insulation needed.

However, we will probably insulate the roof anyway to keep the heat out longer during summer.

I would have thought you would have insulated as much as possible.

Rafaelsen schrieb:
How do you mean that a ground-source heat pump is cheaper than a gas heating system? That would be surprising.

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

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

In my opinion, you achieve this effect anyway with a central mechanical ventilation system with heat recovery. The (warm, fresh) air from the living room flows through overflow areas (hallway) to the exhaust area (for example, kitchen or bathroom), is extracted there, and then cooled down in the central heat exchanger by the fresh supply air from outside. In an open living/dining/kitchen area, the supply and exhaust vents are usually located close to each other anyway.

Mechanical ventilation systems with heat recovery are not inherently quiet in my opinion; special requirements then demand particular measures in planning (generally lower air flow rates per vent, rather low flow velocities in the ducts and overflow vents [especially large gaps under doors reduce flow velocity but eventually negate the purpose of a door; however, there are alternatives]...).

Building legally with a gas heating system in my opinion calls for an architect and a creative energy consultant. It usually doesn’t work out well with a general contractor/building company/developer (exceptions prove the rule). IMHO gas is ideal for heating (of course with condensing technology and underfloor heating with low supply temperature), but unfortunately regulations want 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. But that’s something you have to decide for yourself...

Rafaelsen schrieb:
Dear everyone,
Do you know for sure that since the 2016 Energy Saving Ordinance you can no longer get approval for a gas heating system, or is that just a rumor?

It is my job to know this; however, I should have phrased it differently and more thoroughly instead of answering briefly right before an appointment.

It is always difficult—at least for me—to find sources that are not immediately dismissed as biased; like the saying “he who pays the piper calls the tune.” I hope that with the attached jpgs I have found a neutral explanation of the changes effective from 01.01.2016.

The most important changes to the Energy Saving Ordinance 2016 concern:

• Primary energy factor for electricity: 2.4 (from 1.5.2014) and 1.8 (from 1.1.2016)
• Reference technology: unchanged for residential and non-residential buildings, but partly described more precisely
• Tightening from a system-technical perspective via a general multiplier (0.75) applied to QP,REF from 1.1.2016
• Tightening for heat transfer coefficients (HT’) by about 20% from 1.1.2016
• Introduction of energy efficiency classes in the energy performance certificate and mandatory information requirements for real estate listings
• Verification of certificates

When you look at how much more effort you will need to operate a single-family home with a gas condensing boiler in the future, you will see on the next slide that this extra effort is not necessary when installing an air-to-water heat pump. Also, keeping in mind that today an air-to-water heat pump is about the same price as a gas condensing boiler—and photovoltaic systems and storage are becoming increasingly affordable—you will understand why I wrote that you won’t make it with gas. I can hardly imagine that from January 2016 many homeowners will be willing to bear these “additional” costs only to supposedly heat “cheaply” with gas. Overall, considering all investment costs, gas is actually not cheaper than electricity.

Renewable energies are subsidized and accordingly required in new construction, so that the target—only allowing passive houses from 2020 and only approving zero-energy buildings from 2050—can be achieved. With this goal, in my opinion the traditional gas condensing boiler will become the loser, although heat pumps—for example domestic hot water or fresh water heat pumps—will still be able to meet the Energy Saving Ordinance requirements for a while.

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

Regards, Bauexperte