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Fire-resistant air ducts

Fire-resistant air ducts that are assembled on site from CE-marked fire protective boards covered by a European Technical Assessment (ETA) issued on the basis of a European Assessment Document (EAD) and the related accessories are used as part of ventilation systems in buildings.

Fire-resistant air ducts prevent the spread of fire across separating elements for the verified duration.

Regulatory framework

DIBt grants general construction technique permits (aBG) for fire-resistant air ducts in cases where the ETA does not cover a complete kit consisting of fire protective boards and the associated seals, fittings, connections and fasteners.

MVVTB, Annex 14, Section 6.3.3

National procedure

To prepare an abZ/aBG for your construction product, we need an application from you. We recommend that you contact us prior to doing so. Feel free to send us your enquiry informally via email to dibt(at)dibt(.)de or to the competent technical contact listed in the top right.

For a first assessment, please send us the following information:

  • Description of the construction product and its intended field of use
    • e.g. material, configuration, number of sizes, variants, dimensions
    • e.g. use in walls, ceilings, interior construction, building services
  • Description of the construction technique and its field of application
    • e.g. design of walls, ceilings, elements, etc., and interaction of components
    • e.g. application in foundation engineering, reinforced concrete construction, building insulation; as load-bearing or non-load-bearing component; under static and quasi-static loading; fire exposure; other environmental exposures
  • Information regarding impact on regulatory concerns
    • in particular structural integrity, fire protection, health and environment protection, sound insulation as well as thermal performance
  • Explanation of need for an abZ/aBG
  • Contact details
    • preferably email address and/or telephone number, as well as name, organisation/company, and postal address

We will then contact you to clarify the next steps.

If you already hold a DIBt approval and/or construction technique permit and wish to apply for an amendment, supplement, or renewal, please use the form provided below.

aBG

Z
new decision
E
supplement
Ä
amendment
V
renewal
G
valid until
Subject concerned Applicant Decision no. Validity
from / to
Bauart zum Errichten von Lüftungsleitungen aus Stahlblech mit Bekleidung aus THERMAX SL für eine Feuerwiderstandsdauer von 90 Minuten Mineralka Austria GmbH Nordlandstraße 1 3300 AMSTETTEN ÖSTERREICH Z-41.10-710 Z: 15.07.2025
G: 18.07.2030
Bauart zum Errichten von selbstständigen Lüftungsleitungen aus THERMAX SL für eine Feuerwiderstandsdauer von 90 Minuten Mineralka Austria GmbH Nordlandstraße 1 3300 AMSTETTEN ÖSTERREICH Z-41.10-711 Z: 15.07.2025
G: 18.07.2030
Bauart zum Errichten von Luftleitungen aus Kunststoff (PPs) mit Bekleidung aus THERMAX SL für eine Feuerwiderstandsdauer von 90 Minuten Mineralka Austria GmbH Nordlandstraße 1 3300 AMSTETTEN ÖSTERREICH Z-41.10-719 Z: 14.11.2025
G: 14.11.2030