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As specified by BS5839-6, a Grade D2 system comprises of one or more mains-powered detectors, each with an integral standby power supply consisting of a user-replaceable battery or batteries. All of the below devices are suitable for use as part of a BS5839-6 Grade D2 fire alarm system.

Grade D2 Systems

As specified by BS5839-6, a Grade D2 system comprises of one or more mains-powered detectors, each with an integral standby power supply consisting of a user-replaceable battery or batteries. All of the below devices are suitable for use as part of a BS5839-6 Grade D2 fire alarm system.
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  1. Aico Ei144e Mains Powered Heat Alarm with 9v Back-Up Battery

    Aico Ei144e Mains Powered Heat Alarm with 9v Back-Up Battery Aico Ei144e Mains Powered Heat Alarm with 9v Back-Up Battery
    Ei144e

    > Mains Powered Heat Alarm
    > Alkaline Battery Back Up
    > 5 Year Manufacturers Warranty
    £45.00 £37.50
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