This removable particle filter for the Inogen One G4 covers the air intake screen and filters out airborne contaminants from the room air before it reaches the concentrator.
Designed specifically for the Inogen One G4 portable oxygen concentrator. Not interchangeable with G5 particle filters or other Inogen portables — each model has differently sized intake screens.
Gently wash the filter with warm soapy water once a week, and let it air dry fully before putting it back in place. This keeps proper airflow into your concentrator.
Replace this filter every six months — or sooner if the screen is damaged or the filter is misshapen.
How to clean the filter
- Turn off your concentrator before removing the filter.
- Remove the particle filter from the air intake screen.
- Gently wash with warm soapy water.
- Rinse thoroughly and let the filter air dry completely — do not put it back wet.
- Once dry, reinsert the filter and resume normal use.
Call 1-800-775-0942 with your Inogen One G4 details — we'll confirm fit before you order.
About Main Clinic Supply
We're based in Rochester, Minnesota — home of the world-famous Mayo Clinic. We deliver free to all Mayo Clinic hospitals and local hotels. With FedEx's strong presence in Rochester, our family-owned business is able to ship late into the evening.
Inspired by Mayo Clinic's values, we prioritize helping people over making profits — embodying Dr. Mayo's 1910 mission statement: "The needs of the patient come first."

