![]() The next level up is 60 minutes at 1,700 ☏, which offers a greater degree of security. This is a common certification from both UL and ETL. Most household safes are rated to last 30 minutes at 1,550 ☏, a standard based on modern firefighting response and how a fire typically moves through a house. Then the testers drop the safes three stories before placing them back in the furnace for more heat testing. Testers put the safes in a furnace at a specific temperature, for a specified amount of time a safe-maker can request tests at different temperature and duration marks. He said UL tests to different ratings depending on what kind of rating the manufacturer wants. We spoke to John Drengenberg, consumer safety director at UL, about the organization’s testing procedures.
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