Cleaning and care
CPAP Filters: Which to Clean, Which to Replace, and How Often
Disposable filters are not washable and should be replaced on schedule or sooner if dirty. ResMed says to replace the AirSense 11 air filter every six months or more often if it has holes or is clogged, while Philips says to rinse the DreamStation 2 gray reusable filter every two weeks, replace it every 6 months, and replace the blue disposable filter every 30 nights.
Two kinds of filters
Disposable filters are fine white or blue paper like material. They trap fine particles and are not designed to be washed. Reusable filters are usually gray foam or mesh that blocks larger dust and can be rinsed.
Some machines use only one kind; the DreamStation 2 uses both, with the reusable gray filter and the blue disposable filter together.
ResMed AirSense 11
The AirSense 11 guide says the air filter is not washable or reusable. Check it regularly and replace it every six months, or more often if there are holes or it is blocked by dirt or dust.
Keep the filter and filter cover in place at all times; ResMed says this prevents water and dust from entering the device.
Philips DreamStation 2
The Philips DreamStation 2 quick start guide says to rinse the gray reusable filter with water every two weeks and replace it every 6 months, and not to clean the blue disposable filter but replace it every 30 nights.
Let a rinsed reusable filter dry completely before putting it back.
What insurance usually covers
Medicare's usual maximum is 2 disposable filters (A7038) per month and 1 non disposable filter (A7039) every 6 months. Private plans often follow similar schedules.
Change filters sooner if you have pets, smoke exposure, wildfire smoke or construction dust, or if a filter looks gray.
Supplies that can help
The air inlet filter keeps dust and lint out of the machine and your airway; it is a cheap part that needs regular replacement.
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Frequently asked questions
Can I wash a disposable CPAP filter?
No. Washing ruins its filtering material. ResMed states the AirSense 11 filter is not washable or reusable, and Philips says not to clean the blue disposable filter.
What happens if I do not change my CPAP filter?
A clogged filter restricts airflow and lets more dust through toward the motor and your airway. Replace it on schedule or when it looks dirty.
Are hypoallergenic filters better?
They trap finer particles and some people with allergies prefer them. ResMed notes its approved hypoallergenic filter causes a small reduction in pressure accuracy at high leaks, so use only the filter made for your machine.
Do I need to change filters after being sick?
The AASM recommends replacing filters and disposable accessories after you have recovered from COVID-19, and many people do the same after other respiratory infections.
Sources
Last reviewed October 11, 2026. How we research · Report an error