The BlazeCut tube is heat sensitive. When it reaches a sustained 105 degrees Celsius, a hole is melted in the tube forming the nozzle and releasing the HFC-227ea. The extinguishing agent siphons heat from fire, disrupts the reaction of burning, slows this reaction and suppresses the fire. The amount of agent released into the enclosure is designed to exceed the amount required as per the minimum design concentrations according to NFPA 2001 : 2018 edition.