Construction and Performance Description - Contract including Energy Saving Ordinance 2014

Thank you for the feedback! I now have a few updates also after consulting with the developer. The designation "Kfw 70 efficiency house (Energy Saving Ordinance 2014 - without tightened requirements)" is meant to indicate that construction is according to the initial Energy Saving Ordinance 2014 and not according to the version valid since 2016, the Energy Saving Ordinance 2014 in its "tightened version." Otherwise, the latest version would be the KFW 55 house. As far as I understood it correctly, it is as follows. The Energy Saving Ordinance 2014 had a reference building with an annual primary energy demand of 100%. The KfW 70 house had, in comparison, an annual primary energy demand of 70%. The tightened Energy Saving Ordinance 2014 that has been in effect since 2016 still uses the same reference building of 100% but has higher requirements for primary energy demand and insulation. Thus, the KfW 70 house only meets the minimum requirements here in comparison and corresponds to 100%, but it is still allowed to be built because it does not exceed that. As a new KfW house under this standard, there is the KfW 55 house. Excerpt concerning the tightening of the Energy Saving Ordinance 2014: "The KfW Efficiency House 70 is no longer subsidized and now corresponds to the reference house."

The tightened Energy Saving Ordinance 2014, which has been in effect since 2016, still has the same reference building of 100%

"The KfW Efficiency House 70 is no longer subsidized and now corresponds to the reference house."

As you may notice, that is contradictory. And the Energy Saving Ordinance 2014 has not been valid since 1.1.2016.

The current reference building is an improved version of the former KfW 70 house, meaning these are the minimum requirements that a new building must meet.

I believe you have a misconception or expressed yourself somewhat awkwardly.

To my knowledge, the reference building is still the same as in the Energy Saving Ordinance 2009. You can also see this from the fact that the requirements for a KFW 55 house according to the 2014 and 2016 Energy Saving Ordinances are the same. (55% of the reference house)
With the Energy Saving Ordinance 2016, the house must be 25% better than the reference building. So the reference building is no longer the minimum standard as it was with the 2014 Energy Saving Ordinance.

The current reference building is an improved version of the former KfW 70 house.

Since the reference building is still the same, it therefore cannot be an improved KFW 70 (according to the 2014 Energy Saving Ordinance) house. The minimum standard of a house constructed according to the 2016 Energy Saving Ordinance is only roughly comparable to the former KFW 70 house.

Agreed , although I was primarily referring to the statements regarding the excerpt from the Energy Saving Ordinance. While the explanations from the BU seem a bit strange to me, it may well be that it's only me.