Non-invasive ventilators are mostly used to treat patients with sleep apnea syndrome and respiratory insufficiency. It can be used for about 6-8 hours a day or more depending on the situation. 1. For people with sleep apnea syndrome: i.e. snoring, the machine can be used for as long as you sleep, usually around 7-8 hours. 2. For patients with lung disease, choose the appropriate use time according to the severity of their condition. Generally, patients with chronic obstructive pulmonary disease may not use the machine during the day if their breathing is normal, and if they have breathing difficulties, it is more appropriate to use the machine for 6-8 hours a day; for patients with advanced lung disease, they may need to use the machine for more than 15 hours, and even need invasive mechanical ventilation. It is worth noting that the non-invasive ventilator is not the longer the better, should be in accordance with the medical advice and their own condition of reasonable setting parameters, arrangement of wearing time.