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Clarification of APW vs Dry Chem vs CO2
Posted 2017, Oct 09 05:34
CO2 extinguishers have an advantage over dry chemical extinguishers since they don't leave any residue, Chemical or water, and being Dry Ice, they absorb more heat than Dry Chem. However, there is a disadvantage in that the CO2 does not absorb or remove as much heat as water (water can remove astonishing amounts of heat as it is converted to steam and vented out) and doesn't coat the fuel like Dry Chem, thus allowing a reflash of the fire once the CO2 dissipates. Each has its strength depending on the scenario.