Devilbiss sleepcube, Ultrafine Disposable filters should be replaced every 2-3 months. Filters take in your surroundings so depending on the room your Devilbiss CPAP or Bi-Level Machine is in, they may need to be changed more frequently.
Devilbiss also makes sleepcube Reusable Foam Filters that can be cleaned. The Ultra Fine Filters CAN NOT be cleaned, they are disposable.
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