Spirit Medical offers both. Reusable foam filters, such as the RemStar Foam Filters and Respironics Pollen Filters, can be rinsed, air-dried, and reused for roughly six months before replacement. Disposable ultra-fine filters—including the Ultra Fine Filter for DreamStation and the IntelliPAP Ultra Fine Filters—are single-use and should be swapped about every two weeks, or sooner if you notice discoloration. A common setup pairs one reusable foam filter with a disposable fine filter behind it.

For oxygen concentrator owners, the pre-assembled kits simplify maintenance considerably. The EverFlo Plus, Millennium Plus, and Platinum Filter Plus kits bundle intake HEPA filters, foam cabinet filters, and barbed final filters together, so you can restock everything a unit needs in one order rather than tracking down individual parts.

Not sure which filter fits your machine? Match by your device model and the part number printed on your current filter or its packaging. You can also browse comparable respiratory supply lines from makers like 3B Medical and 2G Medical to find the right fit for your equipment.