Ionization vs Photoelectric Smoke Detectors: Which Type to Install — Complete Guide for Homeowners | WC Safety
Ionization and photoelectric smoke detectors sense fire differently, and choosing only one can cost critical minutes. NFPA 72 and the U.S. Fire Administration note ionization alarms react faster to flaming fires and photoelectric to smoldering fires. This guide covers both technologies, the dual-sensor advice, placement, and a worked example.
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