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  • Up to 4 hour fire rated to BS EN 1634-1 2014
  • Reference standards BS ISO 14520 & BS EN 15004
  • Fire resistance classification to BS EN 13501-2-EW-120
  • Standard 6 year warranty
  • Wall sleeves and adjustable telescopic ducts available
  • Optional security grilles and weather louvres
  • Ducted versions available
  • Bespoke sizes and applications are available on request
  • Minimal maintenance and servicing
  • Fire rated from both directions

Demonstration of Inert PRD opening at 250 Pa

Designed to vent excess room pressure caused by fire suppression gas release.

All high pressure fire suppression systems cause large spikes or pulse pressures in sealed rooms. This pressure must be vented to atmosphere to prevent structural damage.

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