ROOMFIRESETC

The best structural firefighters know that knocking down a fully-involved room fire is mostly about wetting the burning fuel surfaces Steam inerting and gas cooling can help-sometimes a lot; but the dominant mechanism and the objective should be to reduce the supply of gaseous fuel by wetting burning fuel surfaces. - choking off the supply of pyrolysis Heat-driven processes that produce fuel gases from solid and liquid fuels gases... Knockdown is not about absorbing all the fire's heat (HRR).Heat Release Rate What matters is the surface area that water is hitting at the moment. If that area goes out and does not reignite immediately, the stream can make progress by wetting more fuel. If you can make progress you can put the fire out. If most burning fuel surfaces can be painted with water, knockdown happens in seconds... The first is progress instability - how quickly the fire could grow back. If you imagine an interruption in water flow: stable progress will persist after the water..