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A fire alarm is needed to warn people in your Place of Worship that there is a fire. Not all Places of Worship need to have a full electrical fire alarm system installed but all need some means for one person to notify others of a fire.
For the smallest of Places of Worship, a simple hand wound bell or a whistle would be adequate. It is very important that it can be heard throughout the building and that whoever is operating the equipment is not at risk from fire.
For most other buildings, some form of electrical system would be needed and this can include automatic fire detection to provide a more comprehensive system.
Electrical systems
A simple fire alarm system would comprise a controller (with a power supply and backup battery), manual 'break glass' call points, alarm sounders or bells and possibly fire detectors. Smoke detectors are recommended for the fast detection of fire, preventing harm to people and helping to protect the building and the need for detectors would often follow from the Risk Assessment.
Self-contained alarms include a call point and sounder in a simple enclosure that can be mounted on the wall next to exits. These offer a simple and easy solution for many buildings where the expense of a full-scale fire alarm and detection system cannot be justified. A range of these self-contained fire alarms is available from our sponsor, Fire Protection Online.
The fire alarm system could be used in conjunction with the Public Address system in the case of larger Places of Worship. Alarm systems that use speech (known as Voice Alarms) can improve the effective evacuation of the building and they can reduce panic where there are large numbers of people. Loudhailers are a good backup in case the PA system fails but systems that are intended to be used as voice evacuation alarm systems need to be designed to very high standards to prevent failures.
In some parts of the building, for example bell-towers, a flashing strobe might be needed because the alarm sounder may not be heard. Similarly, strobes are useful for compliance with disability discrimination law where deaf people might not clearly understand the alarm.
With larger systems, the building can be split into different 'zones'. This makes it easy to find where the fire alarm has been set off by splitting the building into a number of areas. With advanced systems (known as 'Analogue Addressable' systems), each device is identified separately, making it very easy to pinpoint the exact location.
Wires are used to connect most systems together, but some systems are available that use radio signals. Although these are more expensive, there are major advantages where routing cables could cause damage to buildings of historic significance. With radio systems, it is important to note that the detectors are much larger is size and the system is considerably more costly to install and maintain.
A system would need to be installed by a reputable company because British and European standards exist to make sure that the system complies with the fire regulations. The system might not protect you and your property and false alarms can be a problem with systems that are not designed to the standards (such as British Standard 5839, Part 1 which applies to fire alarm systems within buildings).
A full system requires regular maintenance and testing. Every week, the system should be tested to make sure that it is operational using a test key to operate a different alarm call point each week. Every six to twelve months (depending on the complexity and size) the system should be checked over by a reputable company to ensure that the system will continue to work correctly.
Fire detection
The most important place to have smoke detection in any building is along exit routes. This is to make sure that people have adequate warning that a fire could affect them as they try to leave the building. However, smoke detectors can be used to detect fire in all areas of the Church or Place of Worship to give you early warning. Some systems could even be used to protect the building, not just the people that use it, by altering people out-of-hours when the system is activated.
Smoke detectors should normally be of the 'optical' type, which are more sensitive to smoke particles typical of fires that involve wood, paper and so on. The 'Ionisation' type, typically used in domestic smoke alarms, should normally be avoided because it can be prone to false alarms.
Where normal smoke detectors would be too obtrusive, different system arrangements can be used. These include 'Beam detectors' and 'Aspirating' systems. Beam detectors work be sending a beam of light down the length of a room which is broken by smoke or interrupted by the hot air currents caused by fire. Aspirating systems have a central smoke detector fed by small pipes (normally 6 mm / 1/4" to 25 mm / 1") placed around the area that is covered and can provide a neat solution for historic premises.
Heat detectors should only be installed where there is a high risk of false alarms (like in kitchens) but beware that they are less sensitive to fire and a significant fire can build up before the alarm is raised. Heat detectors are not suitable for protecting exits and corridors and they don't give the same amount of fire detection coverage.
Smoke detectors should not be placed within 3 metres of a kitchen because of false alarms, but this will not affect the speed that a real fire will be picked up. If fire detection is needed in these places, a heat detector is preferred but this should be assessed by someone who is competent in fire alarm system design.
Smoke Alarms
Smoke alarms differ from fire detectors in that they are self-contained fire detection and alarm systems in their own right. Smoke alarms are intended for domestic use, however, they might be used in some smaller, single-story Churches and Places of Worship.
If smoke alarms are to be used, they must be powered from the mains, including a suitable backup battery, and interconnected so that every unit will sound if any one detects a fire. The installation should be completed by a competent electrician and the number and location of alarms chosen carefully to ensure that there is adequate coverage (especially within exit routes) and that the alarm can be heard throughout the building.
With the cost of conventional fire alarm systems falling, and the fact that a full system can include manual call points more readily than a smoke alarm system, a standard fire alarm system would usually be the best option.
Testing
It is important that you test your fire alarm regularly to make sure that it works. You normally need to test your system every week and you must tell people who might be in your Place of Worship that you are about to test the fire alarm.
For hand-powered bells, turn the handle to make sure that the bell works and the alarm is loud enough and not muffled. Smoke alarms can be tested by pressing the test button, making sure that all the other smoke alarms sound at the same time. If you cannot reach the test button, use a broom handle (you might need to put a screw in the end to help you push the button in).
With electrical alarm systems, you need to follow the instructions for the system. With most systems, you will use a test function on the control panel. If you then insert a special key into one of the manual call points, the alarms will sound briefly. You can test any call point in the building, but choose a different one each time. Most alarm control panels need a user code number or key to be used to activate the user function buttons on the panel.
Any electrical system needs to be serviced regularly. It is recommended that systems should be serviced every six months by a competent fire alarm company. The company might suggest some changes to bring the system up to the latest standards and should also repair any faults as soon as they become apparent.
You need to make a note of when you tested your fire alarm (you could use a note book for this). Also, make a note of anything that did not work and what you have done (or are going to do) to fix the problem.
False alarms
Most systems that are correctly designed and maintained should be free from false alarms. The key to making sure that your system is not prone to false alarms is simple: have it installed by a reputable company and have it serviced annually.
Some false alarms are caused by the people who use the building. For example, if someone forgets to switch on an extractor fan in a kitchen. A number of other false alarms are caused by malicious behaviour, perhaps smashing the glass in a call point or by blowing smoke into a detector. These kinds of false alarm are rare in comparison with false alarms caused by poor system maintenance.
With many advanced systems, there is an option to give a "pre-alarm". When a detector is set off, a warning is given so that a false alarm can be cleared without the main alarms sounding. However, breaking the glass on a call point will immediately sound the fire alarm.
Additional Information
Consult a specialist fire alarm installer for the design and installation of electrical fire alarm systems to meet British Standard 5839: part 1.
A range of self-contained fire alarms, including a simple manually activated bell, is available from our sponsor, Fire Protection Online.
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