Chalis Fire Engineering
Specialists in Fire Prevention
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Unless personnel are present at the time a fire occurs there is no way either personnel, buildings, stock and equipment can be adequately protected from fire. It is therefore imperative that the correct level of detection system is chosen to ensure the protection of people and property.

Conventional fire detection systems

Conventional fire detection systems are used in risks that are smaller and less complicated or as a system that is within a system such as a fire suppression detection system. This system consists of detectors, such as point smoke and heat detectors, linear heat detectors and smoke beams, sounders, beacons, interfaces and manual call points. Each device is selected to ensure the system meets the requirements of the British standards and/or good engineering practice.

Analogue fire detection systems

Analogue fire detection systems are used in risks that the larger and more complicated such as large office buildings and hotels. The system consists of the same types of detectors as conventional systems, but with additional functionality to ensure a reliable and economical operation. The detector settings for an analogue fire detection system can be altered to suit the environment where it is located up the level of risk to ensure a fast and reliable detection of fire. This means that early detection or where the environment is poor slower detection can occur, or combined devices utilising smoke and heat can ensure a safe reliable system.

Aspirating smoke detection systems

Aspirating smoke detection systems are used in environments where a smoke detector could not be used or in a situation where access in the future to the detection is difficult such as a warehouse or glass atrium. Aspirating smoke detection systems are also used for early detection or fire within high-risk areas such as computing and data rooms. This ensures if interfaces with their fire suppression system that the fire is suppressed at the earliest possible stage, therefore limiting damage both to the equipment and to the business.

Fire suppression detection systems

A fire suppression detection system can be conventional, analogue or aspirating or a combination of the 3. A fire suppression detection system is different to a standard fire detection system in that it will be interfaced into a fire suppression agent cylinder, which in the event of a fire will be discharged into the protected area. To ensure reliability of the system, all systems would be designed using coincidence zoning so that two different detectors operating on two different zones would need to be triggered before the gas is discharged into the protected area. All fire suppression detection systems are independent of the fire alarm system but are interfaced to them to ensure staff and/or the fire brigade are aware a fire may have been detected so that evacuation can occur as normal. Interfaces are also provided for mechanical plant shutdown, air conditioning, power shutdown and fire dampers. This will ensure the integrity of the fire suppression system and also to take away some of the source of the fire i.e. electrical power.  

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