The Inogen One G3 is one of the top-rated portable oxygen concentrators on the market. Like all the others, it still needs maintenance and will require replacement parts to keep it in good working order. This vital piece of medical equipment needs to be continually working to the best of its abilities because you rely on it for your health.
One of the major parts that will need to be replaced is the Inogen One G3 columns, which are the sieve beds of the unit. The sieve bed works to filter out nitrogen from the air coming into the concentrator. It's the second filter that the air passes through to be concentrated into oxygen.