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4OverrecentyearstheinstallationofvisualalarmdevicesVADshasexperiencedconsiderablegrowth.ThisisinresponsetotheEqualitiesActbutalsoduetotheproveneffectivenessandreliabilityofVADsintheeventofafireeitherintheformofaseparateunitorintegratedwithanaudiblealarm.EuropeancommitteeCENhasreleasedanewstandardEN54-23whichdirectlyaffectstheuseofvisualalarmdevicesinfiredetectionandfirealarmsystemsinnon-domesticpremises.PriortothereleaseofEN54-23noENstandardexisted.Misinterpretationandconfusionoveraproductsperformancewasthereforeacommonconcernintheindustry.ThepurposeofEN54-23istostandardisetherequirementstestmethodsandperformancecriteriaofVADsandensurelightoutputisnowmeasuredinauniformmannerthroughoutEurope.EuropeanStandardEN54-23PurposeComplianceEN54-23Requirementsx0Requiredilluminationof0.4luxorlmm2onasurfaceperpendiculartothedirectionofthelightemittedfromtheVADx0Theroomsizemustbestatedontheproductorsupportingdocumentationx0Flashratemustbebetween0.5Hzand2Hzx0EN54-23becomesmandatoryfrom1stMarch2013acrossEurope.FortheUKPortugalEireandSwedenCPDoptoutsend30thJune2013PowerConsumptionisthebiggestconsiderationwhencomplyingwithEN54-23.VADdevicesmustnowreachtherequiredminimumilluminationof0.4luxovertheentireareaofcoverage.Doublingtheareaofcoveragefromalightsourcewilltakefourtimesthepoweratthesamelevelofillumination.Consequentlythelargertheareathehighertherequiredlightoutputorthehigherthecurrentconsumption.Flashcolourcanalsoinfluencethepowerconsumption.AcrossmostofEuropeaflashingredlightdenotesafirealarmsignalhoweverredlightconsumesmorepowerthanwhitelightforthesameintensity.Aredfilterabsorbstheblueandgreenspectrumoflightallowingonlytheredwavelengthstopassandsotheenergyemittedisreducedwhichcanresultinalossofupto80ofthelightoutput.Thismakesredflashdevicespowerhungryanddrasticallyreducesthecoverageareacomparedtoawhiteflash.RelevanttoUKonly.PleaserefertoyourregionalorlocalrequirementsifoutsidetheUK.