How much smoke does it take to set off an alarm?
by 
The Curious Bag
ANSWERS: 1
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There are two different types of smoke alarms: ionisation and optical. Ionisation alarms are very sensitive to smoke produced by flaming fires such as chip pans and other fires that may start around the kitchen. Optical alarms are usually set off with larger fires, such as upholstery fires and overheated wiring.
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