Your smoke detector may fail 55% of the time
Submitted by John Arnott on
Ionization versus Photoelectric smoke alarms
In 1977 around 22% of homes had at least one smoke alarm. By 2009 around 96% of homes have at least one alarm. However statistics have shown that although the total number of fires has been reduced, the actual fire death rate risk, i.e the number of deaths per 1000 fires, has not changed much during this time period.
The two main types of residential fires are:
1. Fast flame such as cooking fires
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