In plateau areas, the higher altitude, the lower oxygen content in the air, and then hypoxia will make people feel uncomfortable. Although this problem can be lightened by oxygen uptake, the amount of oxygen inhaled is not the more the better, and it requires a scientific ratio. At present, the recognized reasonable oxygen concentration in the medical field is 23-33%. The medical oxygen of this concentration can be used by people safely for a long time and without any side effects. However, if the oxygen concentration reaches and exceeds 40%, it will exceed the upper limit of the safe oxygen concentration, so it is not recommended for human usage directly.

Generally, areas requiring oxygen enrichment are exceeding 2700 meters above the sea level, because people are more likely to have altitude sickness in region above 2700 meters, which is considered as the critical elevation for altitude sickness. Therefore, the demand for oxygen enrichment centralizes in this area of this altitude relatively. In brief, the so-called high-altitude oxygen enrichment project is to increase the oxygen concentration in the air to achieve the oxygen partial pressure as low-altitude environment. For facilitate understanding, we can approximate that for every 1% increase of oxygen concentration in the air, the altitude will drop by 300 meters roughly. The higher the concentration of oxygen, the closer to the partial pressure of oxygen at sea level.

Of course, there is a suitable range here also. Based on the extensive engineering experience and user’s feedback of CAN GAS, the oxygen concentration between 23% and 26% can meet the requirements of most people. Oxygen concentration out of this range will cause a large difference between the oxygen-enriched environment and the outdoors in oxygen partial pressure, which will cause various physical discomforts, or will bring unnecessary dangers of fire safety and waste of oxygen utilization. Therefore, all things considered, the maximum difference between the simulated altitude and the actual altitude should not exceed 2000 meters, that is, it is more reasonable that the oxygen concentration is not recommended to exceed 6 percentage.

All above being said, let’s show you the oxygen concentration recommended by CAN GAS for users at places with high altitudes:

◆When the altitude is about 3000 meters, the oxygen concentration recommended is 23%-24%, which is equal to the oxygen content at an altitude of 2000-2300 meters.

◆ When the altitude is about 4000 meters, the oxygen concentration recommended is 24%-26%, which is equal to the oxygen content at an altitude of 2500 to 3000 meters.

◆ When the altitude is about 5000 meters, the oxygen concentration recommended is 25%-27%, which is equal to the oxygen content of 3200-3800 meters above sea level.

    If there are demands for high-concentration oxygen such as medical service and first aid, it will need medical nasal or headset-type oxygen inhalation devices to meet the different oxygen needs in highland environment.