N₂ ORS Oxygen Reduction Fire Prevention Systems
Most fire systems wait for flames and smoke. N₂ ORS® prevents ignition in the first place.
Hypoxic fire prevention is an active fire protection system that prevents ignition by lowering oxygen levels in a room. Using on-site nitrogen generation, the system continuously maintains a non-combustible atmosphere, protecting facilities such as cold storage rooms, warehouses and archives without the need for traditional fire suppression.
What is an oxygen reduction fire prevention system?
An oxygen reduction fire prevention system is an active fire protection solution that lowers oxygen concentration in a protected area to a controlled level where combustion cannot be sustained.
N₂ ORS does this by generating nitrogen on site and using it to create and maintain an oxygen-reduced atmosphere inside the protected space. Instead of waiting for a fire to start and then suppressing it, the system works continuously to help prevent ignition in the first place.
This makes oxygen reduction an attractive solution for facilities where business interruption, product damage, water damage, or asset loss would have major consequences.
Prevent fires before
they start.
The N₂ ORS® system avoids the damage created by a fire and by traditional fire suppression systems.
24/7 Protection
The reduced oxygen environment generated makes it impossible for a fire to start in the first place.
Unparalleled Safety
& Reliability
Isolcell S.p.A has been part of the work group for the establishment of the world regulations (ISO 20338:2019) for the oxygen reduction fire prevention as well as of the European standard (EN 16750:2017)
Why prevent fire instead of fighting it later?
Most fire protection systems are reactive. N₂ ORS is designed around prevention.
Traditional fire suppression
Conventional systems respond after a fire has already started. Detection, alarm and extinguishing only happen once damage is already possible. In sensitive spaces, suppression media such as water, foam or gas can also create additional loss, contamination or downtime.
N₂ ORS fire prevention
N₂ ORS works continuously to maintain conditions in which a fire cannot ignite. That means round-the-clock protection, no extinguishing-agent damage, and a stronger focus on asset protection, continuity, and risk reduction.
Built for safety, control and reliability
Advanced oxygen monitoring
HarvestWatch is designed for practical commercial use, with a simple plug-and-play networking installation that makes setup straightforward.
Flexible & modular
HarvestWatch is well suited to complex rooms with multiple lots or maturities. Additional sensors can be added where needed, allowing operators to monitor exact fruit response rather than relying on an average.
Continuous hourly monitoring
HarvestWatch provides continuous hourly monitoring of the fruit’s response throughout storage. This gives operators on-going visibility as conditions change.
Precise & Direct
HarvestWatch uses chlorophyll fluorescence to precisely detect the fruit’s Low Oxygen Limit directly from the fruit itself, allowing the operator to respond timeleously.
Respond to the weakest fruit
In commercial storage, the room is only as strong as its most sensitive fruit. HarvestWatch helps operators detect the response of weaker fruit in the room, making it possible to manage oxygen more safely and accurately across mixed fruit conditions.
Detects changing fruit condition
Because HarvestWatch tracks the fruit’s physiological response over time, it can help reveal incorrect storage conditions as well as changes linked to fruit ageing and senescence.
Watch N₂ ORS oxygen reduction fire prevention in action.
TThis short OEM video from Isolcell gives an overview of oxygen reduction fire prevention and how N₂ ORS is applied in real protected environments.
Why partner with Gas At Site for N₂ ORS in Southern Africa
Gas At Site combines proven Isolcell oxygen reduction technology with decades of experience in industrial gases, system integration and controlled atmosphere environments.
As the Southern African partner for N₂ ORS, we help clients evaluate the application, define the right system concept, integrate nitrogen generation and controls, and support the project through commissioning, training and ongoing service.
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Application review and project consultation
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Integration of nitrogen generation and fire prevention system components
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Coordination with project stakeholders, consultants and approval processes
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Commissioning, testing and operator training
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Service agreements and preventive maintenance support
Why Gas At Site for CA Equipment?
Gas At Site combines industrial gas expertise with practical controlled atmosphere knowledge. Since 1990, we have supplied reliable on-site gas generation and CA solutions, helping fruit storage operators select and integrate the right equipment for stable low-oxygen storage. From nitrogen generation and CO₂ scrubbing to HarvestWatch DCA-CF, we focus on proven technologies that work together as a complete system.
Applications for N₂ ORS
Archiving
Automated Warehouses
IT Data Centres
Cold Stores
Substations
Paper Mills
Applications
Cold stores and refrigerated warehouses
Cold storage facilities are a strong fit for oxygen reduction fire prevention. They are typically enclosed, temperature-controlled environments where traditional extinguishing methods may damage valuable goods and only respond after a fire has already begun.
Retail freezers and fridges
Monitor freezers, fridges and display cabinets more easily from one central system. TermoWatch helps retailers identify faults faster and reduce the risk of stock loss.
Research & pharmacy laboratories
Where temperature and humidity compliance matter, TermoWatch supports reliable monitoring, documentation and audit visibility for controlled environments.