Fire breaks out when heat, fuel, and oxygen meet. Without intervention, a fire will only come to an end under two conditions: when the fuel has run out, or when the oxygen supply is exhausted. In an enclosed space, when a fire can deplete most oxygen, the flames will die down while the fuel continues to burn in a smouldering state under pyrolysis. Pyrolysis does not require oxygen, so it can take place without fire at or above 500C and turn organic compounds into charcoal, tar, or non-condensable gases. These gases have extremely high thermal values ready to burst into fireballs as soon as fresh oxygen re-emerges from any new opening. This is called "backdraft", and is what happened in the Mountain B Pub fire.
Wohn-Riester: Wann sich der Steuer-Rabatt auszahlt
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Wohn-Riester: Wann sich der Steuer-Rabatt auszahlt
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Wohn-Riester: Wann sich der Steuer-Rabatt auszahlt | Freie Presse
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