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Thermal Insulation & Energy Saving Regulations (EnEV)


The better thermal insulation and thermal living comfort as well as the use of solar gains are important arguments for new windows and glazings. The legal requirements for this are essentially defined by the Energy Saving Regulations (EnEV), that was revised and came into effect on 01 May 2014. Further information can be found on the website of Federal Ministry of Transport and Digital Infrastructure (BMVBS).


The Energy Saving Regulations (EnEV, “Regulation on energy-saving thermal insulation and energy-saving installations in buildings”) is the national implementation of the European guideline of the energy performance of buildings and the central law for the regulation of the energy consumption in buildings.


Thermal insulation by EnEV 2014

Since 01.01.2016, the EnEV 2014 has tightened the requirements of the annual primary energy demand at new buildings by 25%. The thermal transmittance of the reference building were not tightened directly. The general specifications for the energetic building refurbishment were not amended. However, an increase for entrance doors from 2.9 to 1.8 W/(m²K) was made. French windows with top-hung, folding, sliding or lifting mechanism were defined as new product group 2f and the maximum value for the refurbishment (Annex 3, Table 1) was increased from 1.3 to 1.6 W/m²K.

Since 01.01.2016, the specifications of the mean U value in non-residential buildings was tightened from 1.9 to 1.5 W/(m²K) for transparent components and curtain walling and from 3.1 to 2.5 W/(m²K) for glass roofs, light bands and rooflights. The omitted exemption for shop windows is significantly; new windows and glazings are bringing tangible energy savings and comfort gains, especially for small retail stores and service businesses. 


Interesting facts for the manufacturer

Even if only few direct changes arise for building elements, there are some new regulations and following consequences which manufacturer of windows, doors, facades and glazings should know. A detailed description of the amendments regarding windows, doors, facades and glazings can be found in the publications listed below.

On this page, ift Rosenheim gathers information on consequences of Energy Saving Regulations on windows, doors, gates and glazings.

  • Determination of U value of windows according to DIN EN 14351-1 (product standard windows) including tabulation method
  • ift-Guideline WA-15/2 for windows and facades “suitable for passive houses”
  • Professional assembly of energy-efficient windows


Articles and Interviews Regarding Thermal Insulation

ift Rosenheim combines the technical expertise of more than 150 scientists, engineers and practitioners - each of them is leading in his/her special field. The ift-experts are available for interviews and provide specialist articles that are coordinated with relevant circle of experts. Hereinafter, please find interviews and articles regarding thermal insulation and Energy Conservation Regulations.

Further topic-related services of ift Rosenheim

In addition, ift Rosenheim offers further topic-related services for products and technologies of the building envelope. As an independent institute, ift Rosenheim informs factual and neutral about its business areas. Besides thermal insulation & EnEV, the topics include the areas of safety and burglary protection, CE & CPR, and many others. Please contact us if you have any questions.

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