How to use oxygen concentrator at home? Here's a step-by-step guide Oxygen concentrators suck air from the environment, remove unwanted gases, concentrate oxygen, and then blow it through a pipe to breathe pure oxygen. (Image Source: ANI) Updated: May 13, 2021, 04:01 PM IST During the second wave of the COVID-19 pandemic, while on one side we are witnessing people suffering due to lack of oxygen supply, on the other hand, we see a high demand for oxygen concentrators which have become a critical life-saving resource in the fight against the deadly virus. At a time when patients are struggling due to the unavailability of oxygen cylinders, oxygen concentrators have become the best solution to provide oxygen supply at home to people facing respiratory issues without needing to be replaced or refilled. However, this supplemental oxygen should only be used upon a doctor's prescription.