Upon contact with an open flame, the potassium bicarbonate is converted to potassium carbonate and the oxidizing agent is chemically removed from the burning process by binding the free radicals necessary for the combustion process. No fire can take place without oxidation.
Since this chemical process is a so-called endothermic reaction, additional heat is extracted from the combustion process. The fire is also cooled down considerably.
The fire is thus extinguished in two ways. A major advantages of our aerosol fire extinguishers and aerosol fire suppression systems is that the oxygen content of the ambient air is not reduced. So unlike a gas fire suppression system it is safe for humans and animals.