Inert gas puts a fire out by taking its oxygen away — and leaves nothing else behind. Gemini AMPM is an approved Fike installer, delivering ProInert® IG-55 systems: a blend of argon and nitrogen that suppresses fire with no residue, no thermal shock and no damage to the equipment it protects. Safe for occupied spaces at design concentration.
IG-55 is a 50/50 blend of argon and nitrogen — two gases already in the air around you. On discharge it lowers the oxygen in the protected space from around 21% to roughly 12–13%: too little to sustain combustion, but calculated under BS EN 15004 so occupants can still evacuate safely. There is no fog, no residue, no corrosive by-product and no thermal shock to hot equipment. The gas simply disperses when you ventilate.
As an approved Fike installer, Gemini fits ProInert® — an IG-55 system with a pressure-regulating discharge valve. Instead of an aggressive initial surge, the agent flows into the room at a controlled, steady rate. That means lower peak pressures on the enclosure, smaller relief vents and less strain on the building fabric. And because inert gas travels well in pipework, cylinder banks can sit well away from the space they protect.
Inert gas is the default choice where the contents matter more than the carpet: data centres, comms rooms, switchrooms, archives, heritage stores and laboratories. Water would wreck them. Powder would too. IG-55 suppresses the fire and leaves servers running, documents dry and downtime short. And because argon and nitrogen occur naturally, the agent has zero ozone depletion potential, zero global warming potential and no fluorinated chemistry to worry about later.
We have delivered IG-55 at scale, including the Peterborough Court & Daniel House project in the City of London. Design, installation, commissioning and ongoing maintenance all come from one team, to BS EN 15004 and ISO 14520, with 24-hour named-engineer response behind every system we hand over. One accountable contractor, for the room your business cannot lose.
Yes, within the limits the design sets. BS EN 15004 fixes design concentrations so oxygen falls low enough to suppress fire but stays within safe exposure limits for the agent, and pre-discharge alarms with time delays give occupants clear warning to leave. IG-55 produces no toxic breakdown products and no fog to obscure exits. You should still evacuate on the alarm — but the system is engineered so you can.
Conventional inert systems discharge with a violent initial spike, which forces large pressure-relief vents on the room. ProInert’s valve regulates cylinder pressure through the discharge, so the agent enters the enclosure at a steady rate. Peak pressures drop, relief venting shrinks, and installation in finished buildings gets simpler and cheaper. Gemini is an approved Fike installer, so design, hardware and warranty all line up under one contractor.
Quickly, compared with almost any alternative. Once the fire is confirmed out, the space is ventilated to restore normal oxygen levels and can then be reoccupied — there is no residue to clean, no water to extract and no chemical film on equipment. The bigger job is recharging the cylinders, which we arrange as part of our repair and recommissioning service so protection is restored without drama.
A named engineer, not a call centre, comes back within 24 hours. Tell us the building and what you’re dealing with, and we’ll scope it properly.