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Fire detection and fire alarm systems Part 21: Alarm transmission and fault warning routing equipment. Original standard UNE-EN 54-21-2007 in PDF full version. Additional info + preview on request

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Amendment 1 - Fire detection and fire alarm systems Part 22: Resettable line-type heat detectors. Original standard UNE-EN 54-22-2016 + A1-2021 in PDF full version. Additional info + preview on request

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Fire detection and fire alarm systems Part 24: Components of voice alarm systems Loudspeakers. Original standard UNE-EN 54-24-2010 in PDF full version. Additional info + preview on request

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Fire detection and fire alarm systems Part 25: Components using radio links. Original standard UNE-EN 54-25-2009 in PDF full version. Additional info + preview on request

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Fire detection and fire alarm systems Part 26: Carbon monoxide detectors Point detectors. Original standard UNE-EN 54-26-2019 in PDF full version. Additional info + preview on request

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Fire detection and fire alarms systems Part 27: Duct smoke detectors. Original standard UNE-EN 54-27-2019 in PDF full version. Additional info + preview on request

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