What a fire detection system is
A fire detection and alarm system finds a fire early, tells the people in the building, and passes the signal on, for example to the fire service or a monitoring station. The sooner it detects a fire, the more time people have to leave and the less damage the fire does. The system is the first part of a building’s fire safety, together with escape routes, compartmentation and fire fighting equipment.
The parts of a system
- Detectors sense smoke, heat, flame, gas or a combination (multi-sensor).
- Manual call points let a person raise the alarm.
- The control panel receives signals, shows where the fire is, and controls the outputs. In Europe it follows EN 54-2.
- Sounders, beacons and voice alarm warn the occupants. See voice alarm and evacuation.
- Interfaces start other equipment such as doors, ventilation and extinguishing, and send the signal outside the building.
- Power supply and batteries keep the system working if the mains fail.
Types of fire detection systems
| System | How it works | Best for |
|---|
| Conventional | Detectors share zone circuits. The panel shows the zone in alarm. | Small and medium buildings with few zones |
| Addressable | Every device has its own address. The panel shows the exact device. | Medium and large buildings, campuses, complex sites |
| Wireless | Devices talk to the panel by supervised radio. | Heritage buildings, retrofits, temporary sites |
| Aspirating smoke detection | A pipe network draws air to a very sensitive detector. | Data centers, cleanrooms, high ceilings, cold stores, heritage |
| Beam detection | An infrared beam across the space is weakened by smoke. | Atria, halls, warehouses, large open spaces |
| Linear heat detection | A heat sensing cable reacts at any point along its length. | Tunnels, conveyors, cable trays, harsh areas |
| Flame detection | UV and IR sensors see the radiation of a flame. | Flammable liquids and gases, industrial plant |
| Oil mist detection | Samples crankcase air for oil mist. | Ship and industrial engines |
How to choose a fire detection system
Start with the building and the risk. Four questions decide most projects: how big and complex is the building, how fast must a fire be found, how harsh is the environment, and which standard does the project follow. Small sites with few zones can use a conventional system. Larger or growing sites use an addressable system, often with aspirating detection in critical rooms and voice alarm for evacuation. Where cabling is difficult, wireless devices can be added.
Your sector matters too. See how we protect hospitals, data centers, hotels, warehouses, ships and offshore and other sectors.
Standards
In Europe, fire detection products follow the EN 54 series, and products placed on the market are CE marked under the Construction Products Regulation. Projects in the Middle East may follow UL instead. Our guide to EN 54 lists the parts of the standard and what each one covers. Kidde Global Solutions offers systems for EN 54 and for UL, so you can choose the version your project needs. See our brands.
Design, installation and maintenance
A fire detection system is designed to the standard and the local rules, installed by trained people, commissioned and tested, and then maintained regularly. In Europe, CEN/TS 54-14 gives guidance on planning, design, installation, commissioning, use and maintenance, and national codes add their own rules. Regular service finds faults, dirty detectors and blocked pipes before they matter. Our design tools and training help engineers and installers.
Questions
What is the difference between a fire detection system and a fire alarm system?
The words are used together. Detection finds the fire, and the alarm tells the people. A complete system does both, and often passes the signal on.
How often must a fire detection system be tested?
Local regulations and the standard decide, and the installer sets a maintenance plan. Regular inspection and testing is always part of it.
Which fire detection system is best?
There is no single best system. The right one depends on the building, the risk and the standard. Our team can help you choose.
