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Grade D1 Systems

Under the requirements of BS5839-6 2019 a Grade D1 system is defined as a system with one or more mains powered devices containing a tamper-proof standby power supply (Battery). All of the below devices are suitable for use as part of a Grade D1 fire alarm system.
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  1. FireAngel HM-SN-1 Mains Powered Thermistek Heat Alarm with Lithium Back-Up Battery
    FireAngel HM-SN-1 Mains Powered Thermistek Heat Alarm with Lithium Back-Up Battery FireAngel HM-SN-1 Mains Powered Thermistek Heat Alarm with Lithium Back-Up Battery
    HM-SN-1

    > 230V Mains Powered Alarm
    > 10 Year Sealed Battery
    > Can be upgraded for radio-interlink
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    £46.96 £39.13 As low as £44.78
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