75K views · 1.3K reactions | For today's #TacticalTuesday, take this online course to learn how to assess and approach the scene of a fire based on the latest science-based fire dynamics research and testing, and be better prepared to evaluate a fire’s growth and spread and utilize up-to-date control methods: https://training.fsri.org/course/032-evidence-based-structural-firefighting #NFPA1700 #firefightertraining | Fire Safety Research Institute | Facebook

Read captions for more details👇 . The stack effect in the context of fires operates on the same principles as water flowing through a pipe, but with air moving up a chimney or through a building. When a fire heats the air, this hot air becomes less dense and rises, creating a draft. This upward movement of hot air creates negative pressure at the base, drawing in cooler air from outside to feed the fire with more oxygen. As the fire grows hotter, the draft becomes stronger, pulling in even more