A FirePASS® prevention environment is established by ventilating a room with so-called hypoxic, i.e. oxygen-reduced, air. Hypoxic air is produced by partly filtering out oxygen from ambient atmospheric air, thus typically reducing the oxygen content to 15%, compared to the normal amount of 20.9%. This oxygen level corresponds to the partial pressure of oxygen at an altitude of around 2.700m (9.000ft).
FirePASS doesn’t use the unsafe nitrogen dilution concept offered by competition tying to circumventing our patents. Unlike safe and healthy hypoxic ventilation, nitrogen injection may cause lethal accidents and does not provide sufficient ventilation of an area to be protected.
Hypoxic ventilation was first introduced 20 years ago for athletic training and medical treatment by our affiliated company Hypoxico Inc. in New York. Since then thousands of people around the world train and sleep in hypoxic atmospheres every day: (www.hypoxico.eu).
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Most common flammable solid materials and liquids cannot be ignited in environments with an oxygen level lower than 16%. However, humans easily tolerate an oxygen-reduced atmosphere of 14-16% O2 without any health hazards (instead of 20.9% O2 as in natural, ambient air).
Anybody traveling on a modern passenger airplane has experienced oxygen concentrations of around 15%. In addition, millions of residents live in altitudes of 3.500m / 11.000ft and above, such as in La Paz, Bolivia, without showing any impairment of their physiological functions.
Scientific research has proven that working in such hypoxic conditions does not impose any health hazards on normal healthy human beings.