Inert-gas flooding with Inergen
Suppression using gases that are already in the air — nitrogen, argon and carbon dioxide, stored as a gas and mixed to a concentration a fire cannot survive but a person can.
- Scope
- Survey → commissioning → AMC
- Practice
- ISO 14520 · NFPA 2001
- Typical use
- Archives, data rooms, museums
Nothing in the cylinder that is not already in the room
Inert-gas systems work by lowering the oxygen in an enclosure to a level that will not support combustion while keeping it high enough to support a person leaving the room. The agent is a blend of naturally occurring atmospheric gases, so it has no ozone impact, no global warming potential and no decomposition products — which is why it gets specified for long-life installations and for places holding irreplaceable contents.
It is stored as a high-pressure gas rather than a liquid, so the same protected volume needs more cylinders than a chemical clean agent would, and a cylinder room or bank location has to be part of the design from the start. In exchange the agent itself has no shelf-life question and no phase-down risk attached to it, which matters on a building expected to keep the system for twenty years.
As with any gaseous system, the enclosure does half the work. We survey for leakage, design the quantity and nozzle layout against the real volume, and size the pressure relief for the discharge. Commissioning covers the detection and release sequence, the interlocks, the hold time and the room integrity check, with the discharge calculation handed over.
What the installation is built from
An inert-gas installation is a cylinder bank, a pressure-reduced distribution network and a release sequence built around evacuation.
Tell us about the project
Send the drawings or the BOQ and we will price it line by line. Most enquiries start with a site visit, because the site decides the system — not the catalogue.