Extinguishment of compartment fires using portable chemical extinguishers and water

Extinguishing experiments on post-flashover room fires, using various kinds of portable extinguihers or water jets, are reported. Typically 2–3 kg of AB-type (general purpose) powders were required to put out test fires of almost 5 MW heat release rate. With water the minimum flow for extinction was 17 l/min or 7.5 g/m² s. When halon or B-type powder was used the fire re-ignited.