Minimum thermal protection

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Minimum thermal insulation is a term used in physics for minimum requirements for the thermal insulation of flat components of lounges . The minimum thermal insulation serves to prevent surface condensate and is intended to ensure a hygienic room climate for the residents and to protect the building structure from the harmful effects of moisture. The parameter for the minimum thermal insulation is the thermal resistance R in m²K / W. The reciprocal of R and the heat transfer resistances R si and R se (inside + outside) give the heat transfer coefficient .

The requirement of having to guarantee a certain minimum thermal protection results from Part 2 of DIN 4108. Specific values ​​for the minimum thermal protection of various components are also specified in Part 2 of DIN 4108 .

Further - beyond that - requirements for thermal insulation can be found in the Energy Saving Ordinance (EnEV).

Examples of thermal resistance according to DIN 4108:

  • R ≥ 1.20 m²K / W: external walls; Walls of lounges against floor spaces, passages, open hallways, garages, ground
  • R ≥ 0.90 m²K / W: lower end of lounge rooms without a basement, directly adjacent to the ground
  • R ≥ 1.20 m²K / W: roofs and ceilings upwards, under terraces

literature

  • Klaus W. Usemann: Minimum thermal protection and annual heating requirement. Springer Verlag Berlin Heidelberg, Berlin Heidelberg 2004, ISBN 978-3-540-00064-8 .
  • Ekkehard Richter, Richard Jenisch, Hanns Freymuth, Martin Stohrer: Textbook of building physics. Sound - heat - humidity - light - fire - climate, 6th edition, Vieweg + Teubner Fachverlage GmbH, Wiesbaden 2008, ISBN 978-3-519-55014-3 .
  • Horst Schulze: Timber construction. Walls - ceilings - building products - roofs - constructions, 3rd edition, BG Teubner Verlag, Wiesbaden 2005, ISBN 978-3-322-80169-2 .

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