Shower steam can set off fire alarms when warm moisture moves from the bathroom into a nearby smoke detector. Steam itself is not smoke, but dense water droplets can enter the sensing chamber and scatter light in a way that may be read as smoke by some photoelectric detectors.
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2026-05-08
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2026-05-05Shower fog can set off a smoke detector when warm steam leaves the bathroom and reaches the alarm sensor. This usually happens in hotels, apartments, dormitories, gyms, and shared accommodation projects where the smoke detector is installed too close to the bathroom door or ventilation is weak.