Smoke dampers

Smoke dampers are shut-off devices for preventing the spread of smoke via air ducts. They shut automatically after being triggered by a triggering mechanism, which is actuated upon detection of smoke by the connected smoke detector. Smoke dampers are not fire-resistant. They are therefore not suitable for use as fire dampers.

Regulatory framework

DIBt grants national technical approvals (abZ)/general construction technique permits (aBG) for smoke dampers for use in air ducts.

Please also refer to the relevant provisions of the federal states following MVV TB 2020/1, Part A (M-LüAR) as well as B

Technical rules

Muster-Richtlinie über brandschutztechnische Anforderungen an Lüftungsanlagen (Muster-Lüftungsanlagen-Richtlinie – M-LüAR) (29 pages)

Fassung: 29.09.2005, zuletzt geändert durch Beschluss der Fachkommission Bauaufsicht vom 03.09.2020; Amtliche Mitteilungen 2021/2 (Ausgabe: 30. April 2021); Fachkommission Bauaufsicht der Bauministerkonferenz; DIBt (Hrsg.)

Application forms

National procedure

A national technical approval (abZ) and/or oder general construction technique permit (aBG) is granted upon application (see Model Building Code (MBO), Sections 16a(2) and18(2) and (4)). This also applies to amendments and supplements to, or renewals of existing approvals and/or construction technique permits.

No formal requirements apply. The following information is needed: name and address of the applicant, description of the product and/or construction technique and its field of use or application, type of decision required (new decision, amendment or supplement to, or renewal of, an existing decision).

Please feel free to use the template below.

Application for a national technical approval and/or construction technique permit (3 pages)

Version: January 2018; Application form

Application for amendment / supplementation / renewal of a national technical approval and/or construction technique permit (4 pages)

Version: January 2018; Application form

Guideline: How to provide drawings for national technical approvals and general construction technique permits (5 pages)

Version: July 2017

  • abZ/aBG
  • Z = new decision | E = supplement | Ä = amendment | V = renewal | G = valid until
    Subject concerned Applicant Decision no. Validity
    from / to
    Absperrvorrichtung gegen Rauch in Luftleitungen

    Aerotechnik E. Siegwart GmbH

    Untere Hofwiesen

    66299 Friedrichsthal

    Z-78.4-192 Z: 07.12.2020
    G: 08.12.2025
    Rauchschutzklappe als Absperrvorrichtung gegen die Übertragung von Rauch in Lüftungsleitungen

    Wildeboer Bauteile GmbH

    Marker Weg 11

    26826 Weener

    Z-78.4-40 Z: 02.07.2020
    G: 12.08.2025
    Rauchschutzklappe als Absperrvorrichtung gegen Rauch in Lüftungsleitungen vom Typ JZ-RS

    TROX GmbH


    47504 Neukirchen-Vluyn

    Z-78.4-51 Z: 15.12.2021
    G: 02.01.2027

Juliane Valerius
Head of Section – Fire Protection of Ventilation Systems

Phone +49 30 78730-350
Email jva(at)dibt(.)de

Legal reference documents

Testing, certification, inspection