Fire Safety

Types of Fire Fighting Systems in a Building and Which Your Occupancy Needs

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 Types of Fire Fighting Systems in a Building and Which Your Occupancy Needs. — Title card. Not a photograph of a Secured Engineers site.

A building's fire fighting systems fall into six groups: portable extinguishers, first-aid hose reels, hydrant and wet-riser systems, automatic sprinklers, fire detection and alarm, and special-hazard suppression such as gas or foam. Which of them your building needs depends on its occupancy, height, floor area and hazard under National Building Code (NBC) 2016 Part 4, and on what the state fire officer asks for.

The six groups of fire fighting systems

NBC 2016 Part 4, Table 7 (Minimum Requirements for Fire Fighting Installations) is the table most fire officers start from. Its columns name the installations a building may need: fire extinguisher, first-aid hose reel, wet riser, down-comer, yard hydrant, automatic sprinkler, manually operated electronic fire alarm, and automatic detection and alarm. It then adds the water supply (underground and terrace tanks) and the pump capacity. Each cell reads R (required) or NR (not required) for a given occupancy, height and floor area. The table does not list gas, foam or water-spray systems. Those are decided from the hazard in a room, using the relevant Indian Standard and the fire officer's acceptance.

System	What it does	Where it normally appears
Fire extinguishers	Portable first response by occupants to a small fire; type chosen by fire class	Most occupancies: every floor, near exits and in plant rooms
First-aid hose reel	A fixed hose, permanently connected to water, for occupants and trained staff	Where Table 7 marks it required for the occupancy and height
Wet riser and down-comer	A vertical pipe with a landing valve on each floor. A wet riser is charged by the pumps; a down-comer is fed from a terrace tank	Multi-storey buildings beyond the height and area limits in Table 7
Yard hydrant	Outdoor hydrants on the ring main, used mainly by the fire brigade	Larger plots, factories, warehouses and campuses
Automatic sprinkler	Heat-activated heads that release water over the fire without human action	Where Table 7 marks it required by area, height or basement size; most storage buildings
Detection and alarm	Manual call points, automatic detectors, sounders and a panel; public address in larger buildings	Nearly every building above the smallest thresholds
Special-hazard suppression	Gas, foam or water spray where water is unsuitable or the hazard is unusual	Server and electrical rooms, battery rooms, DG fuel areas, transformer yards, solvent stores

Which systems does your occupancy need?

Table 7 groups buildings by occupancy: residential, educational, institutional, assembly, business, mercantile, industrial, storage and hazardous. Inside each group the rows split by height and floor area. Industrial buildings are further split into low, moderate and high hazard.

Three notes in the table matter for factory and warehouse owners. Note 17 says the industrial rows are for small-scale industry units; for other industries the requirement is worked out from the relevant Indian Standards in consultation with the local fire authority. So a large plant is not read straight off the table. Note 20 says buildings above 15 m are not permitted for storage and hazardous occupancies. And the hazardous rows refer to a minimum 240-minute fire fighting requirement and base pump capacity on the covered area (Note 21).

Occupancy	Systems to expect on the drawing	What changes the answer
Office and business	Extinguishers, hose reels, detection and alarm; risers and hydrants as height and area grow; sprinklers for large floor plates	Height, floor area per floor, basement area
Warehouse and storage	Sprinklers, hydrants, detection, extinguishers	Commodity stored, stack or rack height, covered area
Small-scale factory	Extinguishers, hose reels, hydrants, detection; sprinklers on larger covered areas	Covered area, process hazard, dust or solvents
Large or high-hazard factory	Designed from the relevant Indian Standards and the fire officer's direction, not read off Table 7	Process hazard, storage inventory, utilities
Hospital and institutional	Detection, alarm, public address, risers, sprinklers, compartmentation	Evacuation difficulty, height
Server, electrical and battery rooms	Early smoke detection and gas suppression, on top of the building systems	Room value, ventilation, fire class
Basement and parking	Sprinklers and smoke ventilation once the basement passes the area trigger	Basement area; Table 7 notes use a 200 m² trigger for some installations

What the fire officer adds to Table 7

Table 7 is a national minimum. States adopt it through building bye-laws and fire rules, and the local fire officer applies it to your drawings when issuing the Fire NOC. Expect questions on hazard class, access for a fire tender, and whether the water and pumps match the systems drawn. Your insurer may ask for more than the NOC does. Fire NOC procedure and documents differ by state, so read our notes on Fire NOC for factories in Punjab, Haryana and UP and the NBC 2016 fire and life safety guide for factories.

The right-hand columns of Table 7 give the water side: underground tank capacity, terrace tank capacity, and the pump capacity with a minimum pressure of 3.5 kg/cm² at the remotest point. The notes describe sets of one electric and one diesel standby pump plus a small electric pump for the header. That is why a hydrant-only scheme and a hydrant-plus-sprinkler scheme can have very different pump rooms. For sizing logic see our article on how a factory should plan fire pump capacity.

How to check your own scheme

Write down the occupancy group, building height, floor areas and basement area.
List the hazards: packaging, solvents, dust, battery rooms, DG fuel, cold stores.
Read the matching Table 7 row and mark each installation as required or not.
For anything outside the table, such as a large or high-hazard plant, ask the fire officer in writing which Indian Standard applies.
Check the water: tank, duty pump, diesel standby, jockey pump and the pressure at the remotest point.
Check that detection, alarm and sprinkler flow signals report to one panel, and that the extinguisher type matches each fire class.

For a first estimate of sprinkler water demand, use the sprinkler calculator. It is a planning aid, not a hydraulic calculation.

Gaps that commonly delay a Fire NOC file are easy to spot once you look for them: an extinguisher-only scheme in a storage building, sprinklers drawn without a tank and pump to feed them, and detection zones that do not match the sprinkler zones. A review before submission is cheaper than a rejection after it.

How Secured Engineers helps

Secured Engineers designs fire fighting systems in-house and files the Fire NOC, CEIG and DISCOM net-metering applications in-house. Fire, electrical, HVAC and plumbing can sit under one MEPF contract, which means the pump room, the power supply to the pumps and the detection wiring are designed together. The company works from offices in Noida (Delhi NCR) and Ludhiana, with 535+ projects across 18+ states and 89.77% repeat clients.

If you have a fire drawing or a quotation and want to know whether it matches your occupancy, send it for review. Start from the fire fighting systems page, message us on WhatsApp, call +91 70099 85817, or ask for a free proposal.

Frequently asked

What are the main types of fire fighting systems in a building?

Six groups cover most buildings: portable fire extinguishers, first-aid hose reels, hydrant and wet-riser systems, automatic sprinklers, fire detection and alarm, and special-hazard suppression such as gas, foam or water spray. NBC 2016 Part 4, Table 7 lists the first five by occupancy, height and floor area. Special-hazard systems are chosen from the hazard in a particular room.

Does every building need sprinklers?

No. Table 7 of NBC 2016 Part 4 marks sprinklers as required or not required by occupancy, height and floor area, so a small low-rise office may not need them while a large warehouse or a building with a big basement usually does. The state fire officer can ask for more than the table, and your insurer may too. Confirm the requirement for your building in writing.

What is the difference between a wet riser and a yard hydrant?

A wet riser is a vertical pipe inside the building, permanently charged with water from the pumps, with landing valves on each floor for hose connections. A yard hydrant is an outdoor hydrant on the ring main around the building, used mainly by the fire brigade. Many buildings need both, and Table 7 sets the trigger for each separately.

Which system protects a server room or electrical room?

Water is usually unsuitable for live electrical equipment, so these rooms are normally protected by early smoke detection plus a gas-based suppression system, in addition to the building's sprinklers or hydrants. The choice depends on the room's value, ventilation and the fire class. The design is checked against the relevant Indian Standard and accepted by the fire officer.

Who decides which fire fighting systems are mandatory for my building?

NBC 2016 sets the national minimum, the state's building bye-laws and fire rules adopt it, and the local fire officer applies it to your drawings when issuing the Fire NOC. For large or high-hazard industries, Table 7 itself says the requirement is worked out from the relevant Indian Standards in consultation with the local fire authority.