Fulfillment of obligation according to the Renewable Energy Act through a water-carrying chimney stove

Hello,

So my heating system, consisting of a gas condensing boiler and a water-carrying fireplace, wouldn’t pass? Right?

Apart from the fact that I wouldn’t install such a system – who is supposed to answer your question reliably? No one knows the rest of the wall structure, the insulation, the location of the property in relation to the sun, etc.

Whether it is sufficient in this combination you will only know for sure when the structural engineer/energy consultant has created the calculations for the Energy Saving Ordinance.

Rhenish greetings

@Bauexperte: Why wouldn't you recommend this system to me? I don't think it's bad, since in winter (when I mainly need heat energy) I can significantly relieve my gas heating if I turn on my water-bearing fireplace. The roof orientation is east-west and the building will be constructed either with Poroton or aerated concrete (Ytong). Solar is not worthwhile, I would rather invest the money in the water-bearing fireplace.

How does it work in terms of approval anyway? I mean, a solar system that operates when the sun shines or draws heat from the air, so it works independently of you. A water-supported fireplace also has to be fired, meaning it has to be loaded with wood, etc., which is less predictable than the required output of the solar system. If the water-supported fireplace only runs once a year, it is pointless.

ok, that is an argument, but what if the fireplace runs every day (in the transitional periods and in the cold season)?

Fireplaces can basically be credited, but the efficiency must be 85% or higher. There are only a few offers here, and they almost always still require an expensive storage tank, which does not weigh heavily in combination with a solar system.

[*]Water-bearing fireplaces require an efficiency of 86 % according to EEWärmG (Annex 1, Requirements for the Use of Renewable Energies and Replacement Measures, II. Biomass, 3. Solid Biomass, 3 a , aa, ).

Based on the good information from my energy consultant, I use a water-bearing stove from normatherm energy-saving technology, for which the legal requirements are somewhat lower.

[*]In addition to fireplaces, the EEWärmG also addresses other systems that "only" require an efficiency of 70% (Annex 1, Requirements for the Use of Renewable Energies and Replacement Measures, II. Biomass, 3. Solid Biomass, 3 a , cc, ). These include stoves and water-bearing stoves according to DIN EN 12815, which also require an efficiency of 70 % or more according to 1.BImSchV.

Since I do not have a solar system and it does not make sense given the orientation and location of the building, I also searched for a solution (and found one with the water-bearing stove) that does not require a storage tank.

Such systems have nominal outputs of up to 19 kW and actually deliver such a high proportion of heat that the share of renewable energies required by EEWärmG for new buildings of 50% can definitely be achieved. These stoves are also comparable to a water-bearing fireplace and, at around 4000 euros, much cheaper than automatically operated pellet stoves.
In the future, I will also no longer be dependent on (expensive) pellets but can heat with ordinary firewood.

Fireplace stoves can in principle be credited, but the efficiency must be 85% or higher. There are only a few offers here, and they almost always require an expensive storage tank, which, however, does not weigh heavily in combination with a solar system.

[*]Water-bearing fireplace stoves require according to EEWärmG (Annex 1, Requirements for the use of renewable energies and replacement measures, II. Biomass, 3. Solid biomass, 3 a, aa, ) an efficiency of 86 %.

Due to the good information provided by my energy consultant, I use a water-bearing stove from normatherm Energiespartechnik, for which the legal requirements are somewhat lower.

[*]In addition to the fireplace stoves, the EEWärmG also addresses other systems that "only" require an efficiency of 70% (Annex 1, Requirements for the use of renewable energies and replacement measures, II. Biomass, 3. Solid biomass, 3 a, cc, ). These include, among others, stoves and water-bearing stoves according to DIN EN 12815, which also require an efficiency of 70 % or more according to 1.BImSchV.

Since I do not have a solar system and it does not make sense given the orientation and location of the building, I have also looked for a solution (and found it with the water-bearing stove) that does not require storage.

Such systems have nominal outputs up to 19 kW and actually deliver such a high proportion of heat that the proportion of renewable energies required by EEWärmG for new buildings of 50% can certainly be met. These stoves are also comparable to a water-bearing fireplace stove and at about 4000 euros are much cheaper than automatically operated pellet stoves.
In the future, I will no longer be dependent on (expensive) pellets but can heat with normal firewood.