ᐅ Construction without solar thermal systems, photovoltaic panels, or heat pumps; renewable energy?

Hello,

Baumensch35 schrieb:
Homeowners who are currently building or planning tell me that, ultimately, you have to do something from the above (of course according to the plan).

A typical example of partial or incorrect knowledge based on hearsay or secondhand information.
The use of renewable energies is indeed encouraged (Renewable Energy Act), and in some cases also truly sensible and economical, but it is not mandatory. Even the minimum requirements of the Energy Saving Ordinance do not have to be met in every case => §25 Energy Saving Ordinance.

Baumensch35 schrieb:
...A homeowner told me that the legal requirements are also met by an appropriate building envelope, meaning the U-value.

That is correct! The 15% rule of the Renewable Energy Act (§7, §9, Annex VI) means that the building envelope must be demonstrably 15% better insulated than what the Energy Saving Ordinance requires for that particular building.

Best regards

€uro schrieb:

That is correct! The 15% rule of the Renewable Energy Heat Act (EEWG) (§7,§9, Annex VI). It means that the building envelope must be demonstrably insulated 15% better than what the Energy Saving Ordinance requires for this building.

Hello €uro,

How exactly should this be understood if I want to build to KfW70 standard?
Do I calculate my values to meet KfW70 starting from the 2009 Energy Saving Ordinance values, and then reduce the KfW70 values by another 15%?

Or do I calculate my KfW70 from the 2009 Energy Saving Ordinance values and then take 15% less again directly from the 2009 Energy Saving Ordinance values?

Because the Renewable Energy Heat Act states that for the 15% rule
"the specific thermal insulation requirements for the building envelope to be met according to the Energy Saving Ordinance in its applicable version must be undershot by at least 15 percent."


To me, this means that the 2009 Energy Saving Ordinance values are the basis, regardless of whether I meet KfW70, KfW55, or any other standard?

Best regards
Micha 😎

€uro schrieb:
! The 15% rule of the EEWG (§7,§9, Annex VI) means that the building envelope must be demonstrably insulated 15% better than the energy saving regulation requires for this building.

v.g.

That’s exactly what I heard as well, thanks for the information.
When we move into detailed planning with the architect, the facts will come to light.

Sure, I admit this is secondhand knowledge, as I’m not from the industry.

Therefore, thanks again to everyone in this forum, I have already gained a lot of interesting insights.

Hello,

Micha&Dany schrieb:
....For me, this means that I base the values on the 2009 Energy Saving Ordinance, regardless of whether I also meet KfW70, KfW55, or other standards?!?

Correct. The 15% rule refers to the Ht´ value (Energy Saving Ordinance). The increased KfW requirements relate to the Qp´´ value, which naturally includes the Ht´ improved according to the 15% rule.

Best regards.

Baumensch35 schrieb:
....At night, yes, of course that is secondhand knowledge, but I am not from the industry.

My comment was directed at those who gave you the information! Especially on the internet (forums), you should always question the expertise of the person advising you before implementing their recommendations.

Kind regards

Hi, I have a question about this topic. We were offered a plot of land with a newly built single-family house. The price and location of the property are great for us, but when reviewing the breakdown of individual services, I quickly noticed that there is neither a heat pump nor any form of solar air system or anything similar. It’s a standard Junkers condensing boiler with underfloor heating on the ground floor and four radiators in the attic. According to the seller, this is not necessarily required. The house already has a building permit / planning permission, but it is about half a year old. This seems a bit suspicious to me, or am I right to be concerned that something might be wrong here?

Best regards

P.S. If you find any spelling mistakes, feel free to keep them.