Photoelectric vs Ionization Smoke Detectors (2026 Guide)
Photoelectric and ionization smoke detectors sense different fires at different speeds, and NIST's full-scale testing shows the gap can be a survival margin. This guide explains both technologies, the UL 217 8th Edition tests that reshaped the market in 2024, NFPA 72 placement rules, and a worked five-alarm plan for a three-bedroom home.