Fire Safety

Fire Suppression for a Server Room or Data Centre: Clean Agents, Detection and Approvals

Name: Secured Engineers Private Limited — Noida (Delhi NCR)
Address: Supertech, Astralis Supernova, Sector 94, Noida, Uttar Pradesh, 201301, IN
Telephone: +91 70099 85817

22 October 2026 · 5 min read · by Secured Engineers Editorial Team

Title card reading Fire Suppression for a Server Room or Data Centre, with a row of server racks and a gas cylinder bank in outline. — Title card. Not a photograph of a Secured Engineers site.

A data centre needs very early smoke detection, a clean agent total-flooding system for the data hall, and a sprinkler, pre-action or water mist layer decided by what the racks hold. The National Building Construction Standards 2026 class data centres as Group E, sub-occupancy E-II, recommend aspirating detection, and name heptafluoropropane or fluorinated-ketone clean agents. Rack battery type changes the answer.

What do the 2026 building standards say about data centres?

BIS lists SP 7:2026, the National Building Construction Standards, as the successor to the 2016 code. Part F covers fire and life safety, and its Annex F deals with data centres. A copy is hosted by the Goa fire directorate, and many state rules still cite the 2016 Part 4, so first confirm which edition your state fire service is applying to your file.

Annex F treats a data centre as Group E business occupancy, sub-occupancy E-II, because of its scale and process equipment. It asks for a fire risk assessment at the planning stage and again periodically, covering ignition sources, fire load, electrical risk and HVAC. On layout, server rooms, battery banks and fuel storage are to be separated by fire-rated assemblies, cable-tray openings are to be sealed to the compartment's rating, and no water pipes should run through or above the data hall, UPS room or communications room.

On detection, Annex F recommends aspirating smoke detection in server areas for very early warning, backed by heat and high-sensitivity smoke detectors that trigger suppression. On suppression, it says clean agent systems should be available throughout the data hall, cover the under-floor and overhead spaces, use ozone-friendly agents, be easy to recharge with little downtime, and be tied to the fire alarm and building management system.

Which suppression goes where?

The table below follows the standards' own wording. The notes to the business-building table (Table 7E) are the part that changes from site to site, because they key the data hall to the rack battery.

Space	Protection the 2026 standards point to	What to check on your drawings
Data hall, racks without lithium-ion battery units	Aspirating detection plus clean agent total flooding; building sprinklered	Room volume including floor and ceiling voids, door and cable penetrations
Data hall, rack battery units up to 20 kWh per rack	Wet or dry sprinkler, pre-action, or water mist tested by a third party for lithium-ion units	Pre-action keeps pipes dry until detection confirms a fire
Data hall, rack battery units above 20 kWh per rack	Water mist should not be installed	Re-run the design with the fire authority; do not assume the gas layout carries over
Lithium-ion battery energy storage room	Wet or single-interlock pre-action sprinkler only	Whole room treated as the area of operation, so pump and tank sizing rises
Internet, hyperscale or colocation data centre	Building protection level CL-6	Pump and water storage sized to CL-6, not to an office building
UPS room, network room, under-floor space	Covered by the suppression system; pairing read from Table 9 for the specific risk	Detection in the voids, not only the room ceiling

The notes are written densely and parts of the extract we read are ambiguous, so treat the table as a reading aid and have your fire consultant confirm each row against the published text.

Why does detection decide whether the gas ever works?

A clean agent total-flooding system fills the whole protected volume and works by absorbing heat or interrupting the chemistry of the fire, as the standards describe it. It only works if the agent reaches design concentration and stays there. That depends on two things the owner controls: how early the fire is seen, and how tight the room is.

Early detection is why aspirating smoke detection is recommended. Typically the system uses more than one detection zone to confirm a fire before discharge, so a single dusty fault does not empty cylinders, and it shuts air-handling dampers first so the agent is not pulled out through the ducts. Room tightness is checked by an enclosure integrity test at commissioning. If the door undercut, cable entries or ceiling void leak, the hold time shortens and the system fails when it is needed.

What should the specification and commissioning cover?

Ask every bidder to price against the same room design basis. At minimum it should cover:

The governing standards: IS 15493 (gaseous fire extinguishing systems, general requirements, 2021 revision) plus the standard for the chosen agent, such as the HFC-227ea, IG-541, IG-100 or HCFC Blend A parts. The 2026 reference list also cites the ISO 14520 series.
Agent quantity and design concentration worked from the room volume and temperature, with the calculation handed over.
Discharge time, pressure relief venting for the room, and the pre-discharge alarm and abort arrangements.
Cylinder location, refill source and lead time, so recharge after a discharge or test is days rather than weeks.
Integration with the fire alarm panel, BMS and HVAC shutdown, with a witnessed functional test.
The enclosure integrity test report, as-built drawings and operator training.

Carbon dioxide is a different case. The standards note it floods quickly and suits electrical fires but needs people evacuated because of asphyxiation risk, which makes it a poor fit for a staffed data hall.

Which approvals touch a data centre fire system?

The fire approval is a state matter. The state fire service issues the fire NOC or fire safety approval, normally at plan stage and again before occupation. Two examples show how different the routes are. Maharashtra's 2006 Act, as amended in 2023, says only a licensed agency may carry out fire prevention and life safety work, and requires the owner to file a licensed-agency compliance certificate plus maintenance certificates twice a year, in January and July. Telangana runs an online fire NOC process, and in January 2026 issued a government order on empanelling third-party fire and life safety auditors and system integrators. Its published guidelines look tied to proposed amendments to the state fire act, so confirm their current status with the department.

For northern states, see our guide to fire NOC for factories in Punjab, Haryana and Uttar Pradesh and the fire NOC assistance page. The electrical side, including HT supply, DG sets and transformers, goes to the state Electrical Inspector; our CEIG approval page explains that route.

How Secured Engineers helps

Design is done in-house by our own engineers, and Fire NOC, CEIG and DISCOM net-metering files are prepared in-house as well. Fire detection, gas suppression, sprinklers, electrical and HVAC can sit under one contract, which removes the usual gap between the gas vendor, the electrical contractor and the BMS integrator. We work from offices in Noida (Delhi NCR) and Ludhiana, across 535+ projects in 18+ states, with 89.77% repeat clients. We do not sell fire audits; we review designs and rectify gaps.

If you have a detection layout, room drawings or a gas calculation from a vendor, send them to us for a review before you place the order. Read about our gas and special-hazard suppression scope, then message us on WhatsApp, call +91 70099 85817, or ask for a free proposal.

Frequently asked

Is a sprinkler system alone enough for a server room?

Not usually. The 2026 standards expect the building to be sprinklered and, for data halls, they point to clean agent suppression with very early smoke detection so that a small fault is stopped without wetting equipment. Where rack-level lithium-ion battery units are present, the notes move the data hall towards sprinkler, pre-action or tested water mist instead. Your fire consultant and the state fire service decide the final combination.

Which clean agent should a data hall use?

The standards name heptafluoropropane (HFC-227ea) and fluorinated-ketone systems as examples and accept equivalents, provided the agent is ozone-friendly, leaves no residue and is easy to recharge. Inert gas agents are also covered by their own Indian Standards. The choice turns on room volume, cylinder storage space, recharge supply and your environmental policy, so compare offers on a single room design basis.

Can carbon dioxide protect an occupied data hall?

The 2026 standards describe carbon dioxide flooding as effective on electrical fires but requiring evacuation of people because of the asphyxiation risk. That is why it is normally kept for unoccupied spaces with lock-off and pre-discharge arrangements. For a staffed data hall, a clean agent that is safe at design concentration is the usual route, subject to the agent's own standard.

Do lithium-ion batteries in the racks change the design?

Yes. The notes to the business-building table say that racks with lithium-ion battery units up to 20 kWh per rack call for wet or dry sprinkler, pre-action or third-party-tested water mist, and that water mist should not be installed where units exceed 20 kWh per rack. Battery energy storage rooms are limited to wet or single-interlock pre-action sprinkler. Confirm the rack battery capacity before the suppression choice is frozen.

Who approves the fire system in a data centre?

The state fire service issues the fire approval or NOC, normally at plan stage and again before occupation, and the rules differ by state. Maharashtra, for example, requires fire prevention work to be done through a licensed agency, and Telangana runs an online fire NOC process. The electrical side, including HT supply and DG sets, goes to the state Electrical Inspector.