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[References: 66 tit.]

The paper presents experimental research findings for the characteristics of physical and chemical processes in the seat of fire at different stages of fire development and suppression. Combustion product temperatures and composition, as well as the luminous intensity of the flame were recorded. The research was carried out using a model of class A fire. The most effective combinations of technical equipment were determined that are necessary and sufficient for early fire detection, timely suppression initiation, combustion and smoldering completion. The minimum volumes of a firefighting liquid (water) necessary and sufficient to suppress combustion were determined. The benefits of using feedback systems during firefighting were substantiated. These systems optimize the consumption of fire-extinguishing agents and time of fire suppression by monitoring the fire behavior in real time. Recommendations were made on the engineering of automatic indoor fire suppression systems that optimize the conditions of firefighting and minimize threat to people’s lives and health.