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How to Change the Filter On a Respironics EverFlo Oxygen Concentrator?


Regular maintenance is critical for the everyday performance of your Respironics EverFlo Oxygen Concentrator. Changing your filters will help maintain consistent oxygen flow, prevent overheating, and keep your oxygen supply clean.

How Often Should You Change the Respironics EverFlo Oxygen Concentrator’s Filter?

The Respironics EverFlo filters are low maintenance. So, you only have to change them every two years. You can easily purchase new intake air filters online.

What Does the Intake Filter Do?

The Intake filter screens ambient air as it passes into the oxygen concentrator. The filter captures dust and other airborne pollutants that can clog the machine and get transferred into the oxygen supply you breathe.

What Happens if the Intake Filter is Not Changed?

Eventually, the intake vent will become clogged with airborne dust and pollutants. This will force the oxygen concentrator to work harder to draw in clean air, which can cause overheating and a reduction in oxygen purity.

How to Clean Everflo Oxygen Concentrator Filter

There are generally 2 filters. One internal filter is called a Bacteria Filter and the main HEPA filter is behind the access door on the rear of the oxygen concentrator. Some  EverFlo machines are equipped with an accessory foam cabinet filter that goes on the top rear grate on the rear of the machine.

The internal Bacteria filter is classified as a "lifetime" filter. This means that the filter only needs to be changed if the oxygen concentrator is put on a new patient, or if the machine has major repairs performed. Otherwise, you can leave it installed.

The HEPA filter is a pleated paper filter contained in a plastic housing. It is not serviceable. Do not ever attempt to clean it by running water through it. You simply throw it away and replace it with a new one.

How To Remove Everflo Oxygen Concentrator Filter

The filter is usually located on the side or back of the oxygen concentrator but checks your manual to determine its location as well as how to properly remove it.

You should only remove the filter when it is time to replace or clean it. Follow the filter replacement schedule and filter cleaning schedule provided by your oxygen concentrator manufacturer to ensure the best results from your oxygen concentrator performance.  Be sure when you replace the filter that it is secure and that it is positioned properly.

Never run the oxygen concentrator with the filters removed, as that may affect the oxygen quality you breathe.

Steps to Change the Filter On Respironics EverFlo Oxygen Concentrator

  1. Locate the Intake filter on the back side of the machine, behind the filter cover door
  2. Make sure your oxygen concentrator is unplugged
  3. Open the filter cover using a quarter or a butter knife to lift the panel
  4. Remove the existing intake filter
  5. Replace with a new filter
  6. Be sure not to remove or discard the rubber gasket inside the oxygen concentrator

If you have questions about your Respironics EverFlo Oxygen Concentrator and its accessories, including intake filters, please speak to our experts at The Oxygen Concentrator Supplies Shop. They are ready to help.

Call The Oxygen Concentrator Supplies Shop today at 888-941-1688 or email us at

Chris Vasta

Chris Vasta is the president of The CPAP Shop and an expert in sleep and respiratory therapy. He often provides insights on product design and functionality on various manufacturers’ prototypes and is frequently tapped to provide reviews on new releases.