Emergency warning and evacuation systems are a critical element of every fire safety system. These fire alarm systems are designed to notify building occupants and emergency public responders (either directly or via a monitoring service) in the event of an emergency. This procedure may be initiated automatically by a fire alarm system, fire sprinkler system or manually by a break glass call point.
An Emergency Warning System will consist of the following:
- A manual and automatic alarm activation;
- An alert signal, including an audible signal; or a combination of audible and visible signals (lights/strobes) in areas of high noise. After a pre-determined period of time, the system will automatically switch to an ‘Evacuation’ signal.
- An evacuation signal, including an audible signal; or combination of audible and visible signals, along with automated voice messages instructing the necessary evacuation procedure.
- Ability to allow authorised Fire Wardens or emergency responders to take control and broadcast a verbal emergency public address to all or selected areas of the building via the PA loudspeakers.
- Ability to take manual control of the system if required by authorised Fire Wardens or emergency public responders
- Ability to communicate to one or more Wardens via the Warden Intercommunication Points – EWIS system only
A Sound System & Intercom System for emergency purposes (also known as an EWIS) needs to be installed in instances where the building satisfies one of the following conditions:
- A building with an effective height of more than 25m;
- A Class 3 building having a rise of 2 storeys or more and used as a residential part of a school or accommodation for the aged, children or people with disabilities;
- A Class 3 building used as a residential aged care building;
- A Class 9a building having a floor area of more than 1000m2 or rise of more than 2 storeys;
- A Class 9b building used as a school and having a rise of more than 3 storeys or used as a theatre, public hall or the like having a floor area of more than 1000m2 or a rise of more than 2 storeys.
Sound systems and Intercom systems for emergency purposes must be designed in accordance with the requirements of AS1670.4 and AS2220.