Mechanically smoke and heat extraction system

Mechanical smoke extraction systems direct smoke gas out of the building and are mainly used for interior parts of buildings, e.g. cellars.

Mechanically smoke and heat extraction system

Mechanically smoke and heat extraction system


  • Maintenance
  • Installation
  • Consulting
  • Acceptance
  • Planning & project engineering
  • Commissioning
  • Instruction / Training
  • Support from CWS fire protection officer


  • Various types of fans available, such as roof, wall, duct, axial and centrifugal fans

Mechanical smoke extraction system - advice, installation & maintenance

Mechanical smoke and heat extraction systems (MRA) use a fire gas fan on the roof, in the wall or inside a duct system of the corresponding building, which draws fire gases from the area to be extracted and discharges them to the outside. CWS recommends at least fans of temperature class F600 to prevent malfunctions caused by rising smoke gas temperatures during a fire.

Smoke extraction system for interior rooms

Mechanical smoke and heat extraction systems are used in buildings where it is not possible to install a light dome or natural smoke and heat extraction systems or where areas inside the building need to be ventilated. These can be, for example, multi-storey buildings, cellars, other interior areas and structurally connected rooms, such as sales areas of large department shops.

Fans for mechanical smoke extraction systems:

  1. Roof fans
  2. Wall fans
  3. Duct fans
  4. Axial fans
  5. Centrifugal fans

Maintenance of mechanical smoke ventilation systems: Mechanical smoke and heat extraction systems must be inspected by an expert and additionally serviced by a competent person every year.

All-round carefree package from CWS

CWS Fire Safety analyses the local conditions, plans and installs your mechanical smoke extraction system. We prepare the acceptance test and prepare the documentation. Afterwards, we are happy to take care of the regular maintenance.


  • Fire gas fans ensure the safe removal of smoke
  • Option for interior building areas
  • Alternative for buildings where light domes or natural smoke extraction systems cannot be used

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