Data centre fire detection has one job: find a developing fire at the earliest possible moment, without false alarms. A small fire can stop services, destroy data and cost enormous amounts of money. Even a false alarm can interrupt critical operations.
In this guide, we explain why data centres need special detection, how aspirating smoke detection helps and how to design a reliable system.
Why is fire detection different in a data centre?
Data centres combine several challenges that ordinary rooms do not have:
- Strong airflow. Cooling fans move large volumes of air and dilute smoke, so it reaches ceiling detectors late.
- Hidden spaces. Raised floors, ceiling voids and cabinets can hide a fire.
- Low fuel load, high value. Overheating cables and power equipment usually smoulder first, and the equipment is worth far more than the room.
- No tolerance for downtime. Evacuation, shutdowns and extinguishing release must happen only for real fires.
How aspirating smoke detection helps
Aspirating smoke detection draws air through pipes to a central, very sensitive detector. It can find smoke long before a conventional detector reacts. Pipes can run at the ceiling, under the raised floor, in the return air path and even inside cabinets.
You can find a full explanation in our guide to aspirating smoke detection. In short, the system gives several alarm levels. Staff can investigate at the first level, before the situation becomes critical.
Designing data centre fire detection step by step
- Map the airflow. Understand hot and cold aisles, air handlers and return paths.
- Zone the space. Split the hall into zones that match the cooling and the power layout.
- Choose sensitivity. EN 54-20 defines Class A, B and C for aspirating detectors. Class A offers the highest sensitivity.
- Layer the detection. Combine aspirating detectors with point detectors, so that two signals can confirm a fire.
- Link the response. Connect alarms to air handling control, power systems and building management.
- Plan service. Schedule filter changes, pipe checks and regular testing.
Follow local codes and the requirements of your insurer and your customers.
Common mistakes to avoid
- Placing pipes only at the ceiling and ignoring the raised floor.
- Setting alarm thresholds without watching the real background level of the room.
- Forgetting to update the system after the layout or the cooling changes.
- Skipping cause-and-effect testing between the detection, ventilation and power systems.
Therefore, review the design again whenever racks, cooling or airflow change.
Data centre solutions from Kidde Global Solutions
Our ModuLaser and MiniLaser aspirating smoke detectors are available through AirSense, Kidde Commercial and Edwards. Read how we protect data centres and mission-critical facilities, or visit the aspirating smoke detection page.
Key takeaways
- Data centre fire detection must find smoke very early in rooms with strong airflow.
- Aspirating smoke detection is the usual first layer of data centre fire detection.
- Zone the hall to match cooling and power, and layer the detection.
- Review the data centre fire detection design whenever racks or cooling change.
Frequently asked questions
What is the best detection for a data centre?
Aspirating smoke detection is the common choice because it finds smoke very early in high-airflow rooms. Many designs add point detectors as a second layer.
Why does airflow make data centre detection harder?
Cooling systems move and dilute smoke, so it reaches a ceiling detector late and in low concentrations. Sampling the air actively solves this.
How do you avoid false alarms in a data centre?
Use detectors that learn the background level, use filtration, set sensible alarm levels and combine two signals before a major action.
For general background, read about the data centre and its infrastructure.