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Welcome to the Info Portal of the BBSR

The Federal Institute for Research on Building, Urban Affairs and Spatial Development ("Bundesinstitut für Bau-, Stadt- und Raumforschung - BBSR") advises the responsible federal ministries on technical and scientific questions of energy saving and continuously takes part in the amendment of norms concerning the energy saving.

The main target group of this Info Portal are energy consultants, engineers, architects, and craftsmen that deal with the matter – but also affected citizens that are interested in more detailed information.

Energy Saving Ordinance

Link to EnEV

The Energy Saving Ordinance (EnEV) sets up requirements for newly constructed buildings as well as in connection with the refurbishment of existing buildings.
This section provides documents and information about the current version "EnEV 2013" and about its legal enforcement. Furthermore the official interpretations and bulletins can be obtained from this section.

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Energy Certificates

Energieausweise

Energy Certificates are an important element of the Energy Saving Ordinance. They were introduced in 2007 in course of the transposition of European legislation for new buildings, for renting out or sale of existing buildings and for certain public buildings.
This section provides documents and information about the certificates, the control system and the energy indicators in advertisements.

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Cost effectiveness of energy related refurbishments

Cost effectiveness of energy related refurbishments

If existing buildings are due for maintenance- or renovation measures, these can often be combined in a cost-effective manner with energetic improvements. Against this background, the German Energy Saving Ordinance (EnEV) connects selected refurbishments of existing buildings with requirements.
In the section ‘Economics’, basic information and tools are provided for economic assessment of energetic improvement measures for existing residential buildings. A possible procedure is shown using example cases.

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Test Reference Years (TRY) for computer simulations

Test Reference Years (TRY) for computer aided simulations

To assess the internal climate conditions of a planned building climate datasets (TRY) are needed to represent the outside climate conditions of the building site in an hourly resolution. Deutscher Wetterdienst (German Weather Service, DWD) and BBSR developed in course of a joined project up-to-date datasets for Germany using a 1 square kilometre grid.
In this sub-section, TRY datasets for mean- as well as summer- and winter-extreme present conditions are provided for free download. Climate change prognoses are represented in the datasets for the future (2031 to 2060).

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Energy Saving Act (EnEG)

Link to EnEG

Since 1976, the Energy Saving Act serves as the legal basis for regulations in the sector of energy performance of buildings, but it does not contain any regulations directly relevant for the citizens.
The section "Energy Saving Act" (Menu: "Further Regulations") provides documents and information about the current version of the law ("EnEG 2013") and the recent amendment.

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Heating Cost Ordinance

Link to Heating Cost Ordinance

Since 1981, the Heating Costs Ordinance regulates the metering and allocation of heating- and domestic hot water costs in centrally supplied buildings with two or more units.
The section "Heating Costs Ordinance" (Menu: "Further Regulations") provides documents and information about the current version of the ordinance ("Heating Costs Ordinance 2009") and the recent amendment.

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Europe

Link to Europe

The topic "energy saving" is increasingly becoming an object of European politics. Different directives and additional European legal acts contain regulations for buildings, building products and energy systems.
This section provides documents and information about a choice of relevant directives, about European networks for excange of experience and committees.

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Archive for expired norms

Link to Archive

The long tradition of the German energy saving law has already brought forth more than 30 legal norms. In praxis it is frequently necessary to take a look at expired regulations.
This section provides documents and information about all former valid regulations concerning the energy saving law, among these the EnEV 2009, valid even after 30th April 2014 for special cases of new buildings.

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