Construction products detail

Fire dampers are installed in air ducts of ventilation systems in the area of fire-resistant separating elements to prevent the spread of fire and smoke along the ductwork to other fire compartments for the required fire-resistance duration. In case of fire, they are automatically activated by thermal and, where applicable, smoke triggering devices and shut off the cross sections of the air ducts.

Shut-off devices for exhaust ventilation systems in accordance with DIN 18017-3 are installed in exhaust ventilation ducts which penetrate fire-resistant building components. In combination with the components of the exhaust ventilation system, they prevent the spread of fire from storey to storey. The shut-off devices may be used accordingly for systems based on DIN 18017-3 in which supply air is ducted. The main air ducts must generally be routed vertically through the storeys with free exhaust flow above roof level.

Regulatory framework

DIBt grants national technical approvals (abZ)/general construction technique permits (aBG) for fire dampers not covered by the harmonised product standard EN 15650.

This includes:

• fire dampers for use in fire-resistant suspended ceilings (see MVVTB 2020/1, Sections A 2.2.1.16 (referring to Annex 14, Section 6) and B.3.2.1.8),
• fire dampers for use in exhaust air ducts in commercial kitchens (see MVV TB, 2020/1, Sections A 2.2.1.16 (referring Annex 14, Section 6) and B 3.2.1.8)
• shut-off valves.

Please also refer to the relevant provisions of the federal states following MVV TB 2020/1, Section A 2.2.1.16 (referring to Annex 14), A 2.2.1.11 (M-LüAR) and B 3.2.1.8.