Planning and designing visual and audible notification appliances for fire alarm systems requires professional awareness and specific knowledge of the structures and ambient conditions present within buildings and manufacturing plants. Consideration of this information is essential for ensuring correct system sizing and a cost-effective solution.
a) Audible notification appliances must be loud enough to be capable of delivering an alarm signal which effectively covers the entire intended space. However, they also may not be too loud, i. e. they should not cause any shock reactions when in operation.
b) Visual notification appliances must be able to be seen but not be annoying or contribute to physiological dysfunctions.
In order to configure the ideal system for the given ambient conditions and required coverage area, it is necessary to select devices with optimal performance.
1. Pfannenberg’s EN 54-23 approved flashing lights provide a significantly larger coverage area than LED notification appliances. Although LED light may have a smaller current draw, the over-all power required per square meter of effective coverage area is lower for the flashing lights.
2. Pfannenberg’s EN 54-3 approved sounders uti-lise electromagnetic sound capsule technology to deliver a superior notification signal over a wider coverage area. This creates a more effective and safer system when compared to those with devices using piezo crystal oscillators.
3. With smart designs, higher performance, and efficient operation, Pfannenberg’s visual and audible notification appliances contribute to a cost-effective system. With fewer devices needed, wiring and connection costs are reduced while their quick and easy assembly helps save time during installation.
4. With the free Pfannenberg Sizing Software (PSS), planners, engineers, system integrators and construction companies can plan their fire alarm project easily, comprehensibly, and in compliance with codes & standards.
5. Additional support from Pfannenberg is available. From help with determining the number of units to suit a particular room size, to effective coverage area calculations for specific devices, and even on site ambient noise measurements, our worldwide team is in place to provide assistance to planners, system integrators, contractors, and building owners.
Comprehensive information can be found on this website for in our brochure as PDF download: ‘A perfect fire alarm system needs perfect planning’.