The 5l oxygen concentrator needs to be placed in a ventilated place, and it is forbidden to get wet. Do not use it in the bathroom or in a humid place. During use, the machine will make a popping sound every few seconds, this is normal, it is the sound of steering and exhaust. The 5l oxygen concentrator machine should replace the secondary filter every six months or so.

　　For a 5l oxygen concentrator, the oxygen output flow rate is 1~5 liters when inhaling oxygen, and the "oxygen output concentration" can be stabilized at more than 90% of the medical-grade standard, that is, when the oxygen output of the 5l oxygen concentrator is 1~3 liters , the oxygen concentration is stable at more than 90%, and the oxygen concentration is still more than 90% of the medical-grade standard when using 4 liters and 5 liters of flow.

　　The 5l oxygen concentrator is suitable for: patients with severe diseases, people who need to use a ventilator, and those who need to take oxygen for a long time every day: patients with chronic obstructive pulmonary disease, pulmonary fibrosis, pneumonectomy, lung cancer, pneumoconiosis, silicosis and other lung diseases. When a patient needs a non-invasive ventilator to be used in conjunction with an oxygen concentrator, doctors often suggest that they need at least a 5l oxygen concentrator or an oxygen concentrator with a larger flow, which is more appropriate.

　　This oxygen inhalation mode for people with COPD appears to be more secure and appropriate. This is an important reason why many professional physicians recommend them to use a 5l oxygen concentrator.