Solar shading – quickly designed

Date: 08.10.2015 | Download: Technical article (PDF) | Author(s): Dipl.-Phys. Michael Rossa | Contact: Gabriele Tengler

Simple diagrams for thermal insulation in summer

The current version of the Energy Conservation Directive (EnEV 2013) [1] (Sections 3 and 4) stipulates minimum requirements for thermal insulation of residential and non-residential buildings in summer. The requirements in these sections apply to buildings to be constructed, i.e. new buildings. Evidence of thermal insulation in summer is not required for the refurbishment of buildings. An exception is contained in Section 9 (4 and 5) where the usable area is extended by more than 50 m² (4) and where a new energy appliance is installed (5).


Verification of thermal insulation in summer has been included in the EnEV as part of the design since the 2009 version. This version of EnEV refers to DIN 4108-2:2013-02 [2] for the purpose of providing evidence of thermal insulation in summer. Permissible methods of providing evidence are

  • simplified solar heat gain coefficient method in accordance with No. 8.3 and
  • thermal building simulation in accordance with No. 8.4 of DIN 4108-2.


For the latter method, DIN 4108-2 defines the boundary conditions to be applied.


The complete text incl. pictures is available for downloading as PDF file.

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