Fog and smoke alarms
Plan with whoever manages the alarm. Never disable one yourself.
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Yes, it may
One maker's warning sheet says that, depending on the amount of fog or haze, all fog and haze machines may set off smoke detectors.
Why
NIST explains that smoke detectors respond to particles: ionization types when particles reduce a small current, photoelectric types when particles reflect light. Smoke detector types
Never disable an alarm
USFA says disabling a smoke alarm or removing the battery can be a deadly mistake. Do not cover, unplug, or remove an alarm.
At a venue
Ask the venue who manages the fire alarm system and what their rules are for fog and haze. Get the answer in writing. Fog at weddings and venues
Sources: Chauvet DJ, Fog and Haze Warning Sheet; U.S. Fire Administration, Smoke Alarms; NIST, How Do Smoke Detectors Work?. Brand names belong to their owners. We are not affiliated with or endorsed by them.
FAQ
General information only. Follow your machine's manual and the label on any fluid. Fog and haze can set off smoke alarms and make it hard to see. Never disable an alarm. Check the venue's or building's rules before you use any effect. Dry ice can cause frostbite and gives off carbon dioxide, which can build up in low or enclosed spaces. Never touch it with bare hands, never seal it in a container, use it only with good ventilation, and keep it away from children and pets. Anyone with asthma or another breathing condition should ask a doctor before being around fog, haze, or dry ice effects.
Next: smoke detector types
Ionization and photoelectric.
