Low smoke layer

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The low-smoke layer is the distance between the floor and the underside of the smoke gas layer . It serves as the basis for calculating smoke and heat extraction systems . The term "low-smoke" replaces the previously used expression "smoke-free" in the fire protection standards and regulations in order to describe the state more appropriately and to adapt the wording to current laws and regulations. The requirements for the conditions of the air have of course not changed due to the correction of the term. Therefore, for example, no increase in the CO 2 concentration or the reduction in visibility for the low-smoke layer can be derived from this.

The low-smoke layer has a minimum height of 2.50 m and fulfills several purposes: It enables people to escape from the burning building, to rescue themselves and others, as well as fire and rescue workers to quickly find the source of the fire and thus fight the fire quickly. It prevents or reduces further damage caused by fire gases and thermal decomposition products to the facilities or buildings.


  • Ulrich Cimolino (eds.), Christian Emrich, Stefan Svensson: Tactical ventilation. Ventilation systems in use, eco med. Verlag, Landsberg am Lech 2012, ISBN 978-3-609-68426-0 .
  • Claus Scheer, Mandy Peter, German Society for Wood Research (Hrsg.): Wood fire protection manual. 3rd edition, Ernst & Sohn Verlag, Munich 2009, ISBN 978-3-433-02902-2 .

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