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Structural firefighting gear isrecommended by the NFPA (National Fire Protection Association) to be rated at a minimum of a TPP (Thermal Protective Performance) rating of 35. A good rule of thumb for translating a TPP rating into time in heat is to cut your TPP rating in half, this is the number of seconds you have in 1,000 degrees.

This means that we have about 18 seconds to in a room of 1,000.

An average temperature that we withstand in a structure fire is usually between 400 and 800 degrees.

With this heat resistence is also a big limitation. Though, we have protection from most heat transfer, we have little to no protection from steam. This penetrates right into the suit, and causes very painful burns.

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Q: How much heat can a firefighter suit stand?
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