The Zen-O Portable Oxygen Concentrator contains a removable and replaceable sieve filter that removes inert gases from the surrounding air. This concentrates that air into medical-grade oxygen. The filter works hard for a long time but should be replaced yearly. You will need a screw driver and a T10 Torx Bit to replace them.
To ensure that your concentrator is always operating at its best and producing the correct concentration of clean oxygen, have a pair of replacement sieve beds on hand.
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