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ISO 7240-15:2004 specifies requirements, test methods and performance criteria for point-type resettable multisensor fire detectors for use in fire detection systems installed in buildings, incorporating in one mechanical enclosure at least one smoke sensor and at least one other sensor which responds to heat, and in which the signal(s) of the smoke sensor(s) is/are combined with the signal(s) of the heat sensor(s). The performance of single components within a multisensor fire detector covered by this standard may not be sufficient for conformity to other standards for the single sensor.