CPAP filters are the most frequently replaced medical device consumable — every 2 weeks for disposables, monthly for reusables. At OEM prices ($3-5 per disposable filter), that is $78-130 per year. Compatible medical-grade filters at $0.50-1.00 each reduce this to $13-26 annually with identical filtration performance.
Disposable fine filters cut to the AirSense 10 / AirCurve 10 / S9 filter slot. Media captures pollen, dust and mold spores before pressurised air reaches your airway. Bought as a multi-pack, a 2-week replacement rhythm costs a fraction of OEM pricing.
Fits the S9 and carries over to the S10 and AirCurve. Same disposable ultra-fine media as the AirSense pick; choose this listing if your machine is the older S9 generation.
Filter set for the Philips Respironics DreamStation: disposable ultra-fine plus reusable foam pollen filter. Wash the foam monthly, replace the disposable every 2 weeks, and swap the foam every 6 months.
CPAP filter replacement is a health decision, not just a maintenance decision. You breathe through this filter under pressure for 6-8 hours every night. A gray or discolored disposable filter should be replaced immediately — do not wait for the 2-week mark. If you have allergies, live in a dusty environment, or have pets in the bedroom, consider weekly replacement. The cost difference between weekly and bi-weekly replacement with compatible filters is approximately $13/year — a trivial amount for cleaner therapy air.
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Magnuson-Moss Warranty Act (15 U.S.C. 2301-2312) prohibits manufacturers from voiding your warranty solely for using third-party replacement parts.