How can information such as the Energy Saving Ordinance 2016 be accessed?

Just received a preliminary energy saving ordinance calculation. Can someone help me with the interpretation? Where can I find the relevant values I need to achieve KFW 55?

Just read through the construction service description of the major general contractors - they are available online. That gives a relatively good idea of what is sufficient for what and what is not.

Our experience is that there is a certain uncertainty among the general contractors regarding the new Energy Saving Ordinance – both in terms of implementation and impact.

We submitted just before the turn of the year and are glad to still have the old rules, as they still leave options open to build with gas without solar.

Hello Cumpa,

Excerpt from the information sheet "Energy-Efficient Building (153)"

Alternative proof of a KfW Efficiency House 55 according to reference values

The requirements for a KfW Efficiency House 55 are met if the following structural and system-technical requirements (reference values) are implemented. In this case, a calculation proof for the KfW Efficiency House 55 is not required.

1.) The following requirements for the respective individual components of the thermal building envelope must be complied with. The requirements for the execution of thermal bridges as well as for the airtightness of the building envelope must be met.

• Roof surfaces, top floor ceiling, dormers U ≤ 0.14 W/(m² K)

• Windows and other transparent components Uw ≤ 0.90 W/(m² K)

• Exterior walls, ceilings downward against outside air U ≤ 0.20 W/(m² K)

• Other opaque components (basement ceilings, walls and ceilings to unheated rooms, wall and floor surfaces against soil, etc.) U ≤ 0.25 W/(m² K)

• Doors (basement and exterior doors) UD ≤ 1.2 W/(m² K)

• Avoidance of thermal bridges ΔUWB ≤ 0.035 W/(m² K)

• Airtightness of the building envelope n50 ≤ 1.5 h-1

2.) For the system technology, one of the following six system concepts must be implemented. The installation location of the heat generator or heat transfer station must be within the thermal building envelope and a central domestic hot water preparation must be available. Domestic hot water circulation is permissible.

1. Condensing boiler, solar domestic hot water preparation (standard values according to DIN V 4701-10), central ventilation system with heat recovery (heat provision degree > 80%)

2. District heating with certified primary energy factor fp ≤ 0.7, central ventilation system with heat recovery (heat provision degree > 80%)

3. Central biomass heating system based on wood pellets, wood chips or log wood

4. Brine-water heat pump with surface heating system for heat transfer, central exhaust air system

5. Water-water heat pump with surface heating system for heat transfer, central exhaust air system

6. Air-water heat pump with surface heating system for heat transfer, central ventilation system with heat recovery (heat provision degree > 80%)

A central exhaust air system can be replaced by a ventilation system with heat recovery. Deviations beyond the mentioned requirements for the components and the listed system concepts are not permitted for this verification procedure. Further heat generators for heating or domestic hot water are not permissible, not even as supplementary heat generators. Where sensible, the concepts can be supplemented by solar thermal systems (heating support, domestic hot water preparation) or photovoltaic systems.

Hope this helps you a little further.

Regards D.Gerner