All documents in your safe are among the most vulnerable materials that you will have. With the combustion temperature at approx. 350° F, and the average house fire temperature about 1800° F, there is a good chance that even the best fire safes will not protect these sensitive documents. Safe Defender’s CO2 response activates at approx. 230° F, eliminating combustion, and slowly meters it throughout the safe for up to 45 minutes, which is longer than most home fires last!