Server room fire suppression is a fixed system that floods the room with a clean agent. That is a gas that puts a fire out without water, without powder and without leaving residue on the equipment. It protects the servers and the data on them from both the fire and the cleanup a sprinkler would cause. Boss Fire Protection installs and services Kidde fire suppression systems for server rooms, network closets and electrical rooms across Dallas-Fort Worth, and the agent is usually the easy decision. The harder part is the room and the people in it.
- A clean agent floods the whole room and leaves no residue
- Smoke detection starts it, after an alarm that clears the room
- The room has to be sealed well enough to hold the gas
- Where staff could be exposed, OSHA requires a yearly inspection and a semiannual cylinder check
What Is the Best Fire Suppression for a Server Room?
For most server rooms the best fire suppression is a clean agent system. It floods the room with a gas that does not conduct electricity and leaves nothing to clean off the equipment. Water from a sprinkler can put the fire out and still ruin every server it touches, so clean agent is chosen where the equipment matters.
Clean agents come in two families, halocarbons such as FM-200 and FK-5-1-12, and inert gases that lower the oxygen in the room. How the two families work, and why a small room usually suits a halocarbon, is set out in clean agent fire suppression. Choosing between the two common halocarbons is its own question, answered in FM-200 or Novec 1230.
Can You Use Sprinklers in a Server Room?
Yes, and where the building code requires sprinklers they stay, because a clean agent system protects the room while the sprinklers protect the building. The clean agent system is meant to stop a fire early, in the equipment, so the sprinklers above never have to open and soak the racks below them.
Information technology rooms have their own national standard, NFPA 75, the Standard for the Fire Protection of Information Technology Equipment, and the clean agent system itself is designed and installed under NFPA 2001. Your building’s fire code official decides which of them apply to your room, which is why the design starts with the building’s own permit drawings.
How a Server Room System Works
A server room system has four working parts, and every one of them is checked at each inspection.
- Detection. Smoke detectors in the room, and often under a raised floor or above the ceiling, send a signal to a release panel.
- Warning. The panel sounds an alarm and counts down before the agent is released, so everyone can leave the room first.
- Agent storage. Cylinders of agent stand in or beside the room, piped to nozzles sized so the whole room reaches its design concentration at once.
- The room. Walls, ceiling, floor and doors hold the gas long enough to put the fire out and keep it from starting again.
OSHA’s rule for fixed extinguishing systems requires that warning for any total flooding system. 29 CFR 1910.160 says an employer provides a pre-discharge employee alarm that gives people time to get out before the system discharges, and automatic release through an approved fire detection device tied to that alarm. Rooms protected by an agent at a concentration known to be hazardous also carry warning signs at the entrance and inside.
5 percent
The loss of agent weight, or 10 percent loss of pressure, that sends a refillable cylinder for maintenance at its semiannual check, under OSHA’s general rule for fixed extinguishing systems.
Sourced to OSHA 29 CFR 1910.160, Fixed extinguishing systems, general
The Room Is the Weak Point, Not the Agent
A clean agent only works if the room holds it. Most advice about server room fire suppression is about which gas to buy, and the gas is rarely what lets a fire win. What lets it win is a room that has changed since the system was designed.
| Change to the room | Why it matters to the system |
|---|---|
| New cable or conduit holes | Agent drains out through openings that were not there when the room was sealed |
| A door propped open | The room cannot hold its design concentration |
| More racks or a bigger room | The agent quantity was calculated for the old volume |
| New ceiling or floor tiles | Detection and nozzles may now sit in the wrong space |
| New air handling | Fans and dampers may need to shut down when the system releases |
None of these changes is unusual. A cable run is added on a Saturday, a door is propped open for cooling, and nobody tells whoever services the fire suppression system. The annual inspection is the moment those changes are found, so tell the technician what has changed in the room since the last visit.
How Often Does a Server Room System Need Inspection?
A server room clean agent system needs a full inspection at least once a year, and its cylinders need a weight and pressure check at least every six months. OSHA’s workplace rule requires both wherever employees could be exposed to the agent, and NFPA 2001 sets the same yearly rhythm.
The dates are recorded on the cylinder, on a tag or in one central record. OSHA 29 CFR 1910.160 asks for the annual inspection by a person who knows how the system is designed and works. It also asks that the people who look after the system are trained, and that their training is reviewed every year. Where that person is an outside service company, the yearly report is your record that it was done.
Older Systems Still Protecting Server Rooms
Some server rooms in Dallas-Fort Worth are still protected by halon systems installed decades ago. A halon system can stay in service, but it cannot be vented for routine testing and is recharged only from recycled halon, so many owners plan a change to a clean agent before the next discharge or failed check. What to do with one is covered in still have a halon system.
Getting a Server Room Protected in Dallas-Fort Worth
Boss Fire Protection installs Kidde clean agent systems and inspects existing ones on the NFPA 2001 schedule. Before any work starts we walk the room, look for the openings and changes in the table above, and give you the agent, the cylinder count and the cost in writing.
Sources: OSHA 29 CFR 1910.160, Fixed extinguishing systems, general, on pre-discharge employee alarms and automatic actuation of total flooding systems, hazard warning signs, annual inspection, the semiannual weight and pressure check with its 5 percent and 10 percent limits, inspection records and training. NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems, and NFPA 75, Standard for the Fire Protection of Information Technology Equipment (National Fire Protection Association). U.S. Environmental Protection Agency, Halons Program, on recycled halon as the only supply since 1994 and the ban on venting halon during testing and servicing.
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Inspections, service, red-tag repair, and new installs for commercial kitchens across Dallas-Fort Worth. Photo-documented work and a written report, every visit.
