False Alarm Causes and Potential Solutions
False alarm is often caused by activities near fire detectors, particularly smoke detectors. In order to prevent unwanted false alarms, you should consider the following causes and solutions.
Cooking fumes
Ensure that cooking is only permitted in designated areas that have appropriate fire detection devices (usually heat detectors). Additionally, the proper use of extractor fans and the closing of doors between designated areas for cooking and detector heads can prevent false alarms from occurring. Places where toasters are used must be carefully considered as they often cause false alarms.
Smoking
It is recommended that smoking should only be allowed in designated areas protected by suitable detectors which are not susceptible to activation by cigarette smoke. You will set off smoke detectors if you smoke under them!
Aerosol sprays
When possible, avoid using aerosols near fire alarm detector heads; if this is not possible, use alternative products. Many smoke detectors will be triggered by products such as deodorant or hair spray.
Shower steam
Ensure that the shower room has adequate ventilation and keep the doors to the outer rooms closed. Signage can sometimes help guests and staff in understanding the significance of closing doors and taking action to avoid excessive steam buildup.
Industrial steam
Get advice from a certified alarm engineer on the right type of detector to install.
Dusty/hot work
Cover detectors temporarily while the activity is being carried out. Temporary covers should only be installed by approved staff and removed as soon as the activity is completed. While detectors are covered in this way, all employees should be trained to activate a 'break glass' call point in the event of a fire. In the future, dust can also prevent detectors from working effectively. So, any hot or dusty work needs to be planned carefully.
Changes to the building's layout or use
It is important to review the fire risk assessment when changes are planned so that the fire-detection system is suitable for the way the building will be used.
Incorrect positioning of detectors
Using the wrong detector may result in false alarms. It may be necessary to move a detector if it is positioned too close to an area where environmental conditions may cause its activation. You should have a competent person perform this work.
Testing and Maintenance
If your system is monitored, you must inform your alarm center before you start any testing or maintenance and inform them once it is complete.
Faulty detectors
It is possible for detectors to develop faults, resulting in repeated, unexplained AFA actuations. If necessary, a competent person should replace the faulty detector head and check the fire alarm system.
Above changes to fire alarm systems should only be undertaken by a competent person or contractor. All changes should be documented, and the appropriate certification kept in your fire safety logbook.
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