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,                   .                     .             2.5 m     A, B     .           30 cm  .ABSTRACTAn automatic spreading fire extinguisher usually installed in a closed area like a boiler room, a laundry store or a res-taurant’s kitchen room is one of the fire protection equipments. This extinguisher automatically discharges dry powder,extinguishing fire. As this extinguisher has the extinguishing capability applicable to the nominal protection area, objectsoutside the area cannot be properly extinguished. However only its number is being requested according to the floor areain the related laws, and the extinguishing capability depends on the distance from a fire source. In this study we tried toinvestigate the extinguishing capability of the automatic spreading fire extinguisher in accordance with horizontal separa-tion distance from a fire source. It appeared that the maximum horizontal separation distance was about 30 cm for bothclass A and B fire to be certainly extinguished.

Fire Extinguishing Capability of an Automatic Spreading Fire Extinguisher in Accordance with Horizontal Distance from a Fire Source