Systemair

Stairways Pressure Differential Systems

Important for saving lives and helping firefighting efforts

Safe escape routes for people and safe entry routes for firefighters is the key points of a building's safety concept.

The basis of the fire safety concepts in Europe is the standard 120101 part 6. This standard is separated into application classes, A to F.

Class A to E describes self-rescue with (partly) simultaneous firefighting.  Here, the focus is on self-rescue and the maximum differential pressure must be below 50 Pa.

Class F addresses firefighting. Here, the permissible differential pressures must be above 50 Pa.

Mechanical systems cannot usually switch between different operating pressures. (max 50Pa/min50Pa).

For this reason, electronically controlled overpressure systems bring a new dimension to fire protection. With a simple switch, the fire brigades can increase the system to maximum performance, which usually eliminates the need for mobile fans. This means that electronic overpressure systems not only support rescue routes, but also provide additional protection to firefighters against flue gases at high temperatures/pressures. It will provide clear visibility and usually make it possible to quickly reach the cause of the fire.

Systemair is the leading company in differential pressure systems with control of EC-motor technology or frequency inverter control technology. An airtight building places higher demands on the systems reaction time.

In the design of a pressure difference system the fans required for smoke extraction of inner shafts plays an important role. The merging of both smoke extract fan and the supply fan into a working concept is the latest development from Systemair.

Benefits of electronic overpressure systems

  • Faster self-rescue: Fire escape stairways are recommended even if other arrangements are permitted for escape and rescue routes. Evacuating people is faster through smoke-free stairways or stairways with less smoke. The panic risk is reduced as well.
  • Faster rescue by others: For electronic overpressure systems, the air supply of the fans can be switched to the maximum air volume by a fire fighter's switch. This pushes the smoke away, even at high fire temperatures. Thanks to this, a time-consuming installation of mobile fans will in many cases be unnecessary.
  • More flexibility during fire-fighting operations: Mobile fans placed by the building’s exit/entrance can become a tripping hazard for emergency task forces. With the Systemair Pressure Differential System those fans are not needed.
  • Higher security for emergency task forces: High air velocities combined with electronically controlled ventilation reduces the concentration of flammable gases and hot air in the zone on fire. This reduces the risk of backdrafts and delays flashover.
  • Higher building protection: With the possibility of overriding the set pressure with the electronic overpressure system, the firefighters will be able to access the building faster which can reduce the fire damage to the building.
  • Reliability: Electronic overpressure systems are not affected by wind loads, snow coverings or pressure changes due to cold or warm supply air.
  • Reduction of construction costs: Openings for air outlets are not required. Control dampers and additional weather protection equipment are usually not necessary.
  • Reduction of operating costs: No complex adjusting or cleaning of mechanical control dampers.
  • Steady precision during life cycle: Electronic overpressure systems automatically compensate for potential leakages due to normal wear and tear of the building.
  • Architectural freedom: Huge air terminal devices or high roof fans are not required.

Read more about pressure differential systems

Online catalogue

Find detailed product information in the online catalogue.

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