ResMed AirCurve and AirSense 10 Replacement Filters are designed to keep out mold and other allergens while you sleep.
Made of polyester fiber, these filters are crafted to fit seamlessly with the ResMed AirMini device.
Made of foam and mounted on a specially shaped plastic holder, the Transcend 3 Somnetics Filter Assembly is a reusable filter engineered to trap allergens before they reach your airway.
If you have a Luna G3 machine, you can choose between the standard reusable filter or a disposable alternative.
We analyze CPAP filter specifications to learn about fabrics, compatibility, durability, brand reputation, and quality. Using filters correctly can decrease your chance of inhaling allergens or dust, so it’s critical to get a filter that correctly fits your machine. In addition to studying product details, we also consider reviews from current users so that we can see how well a filter holds up to regular home use.
As a CPAP machine pulls in air from the environment, CPAP filters help eliminate particles such as dust, pollen, animal dander, mold, and smoke from the air before it gets into the tubing and CPAP mask. The filter is an essential part of the CPAP machine, and a dirty filter can raise the risk of sickness or allergy symptoms, as well as shorten the device’s lifespan.
Standard CPAP machine filters come in two types: reusable or disposable. Most devices use just one type of filter, while some have a dual filtration system that allows you to use both simultaneously.
In-line bacteria filters are an optional addition to CPAP machines. In-line filters, which typically attach between CPAP tubing and the machine’s air outlet, are designed to lower the risk of infection from bacteria. They're sometimes recommended for devices with a heated humidifier.
| Filter Type | Description | Benefits | Drawbacks |
| Disposable Filters | Reusable filters tend to consist of a thicker foam piece that traps larger particles, such as pollen. |
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| Reusable Filters | Disposable filters are made of thin, paper-like mesh material that holds an electrostatic charge to attract tiny particles. |
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Reusable filters and disposable filters have different strengths. Disposable filters are excellent at trapping small particles like smoke and pollution, while reusable filters are better at catching pollen and pet dander.
Manufacturers often provide strict instructions for choosing a CPAP filter, as not all filters are compatible with a given device. However, within the limits of these recommendations, you should consider your own needs regarding factors like price, material quality, and how sensitive you are to allergens.
| Filter Type | Disposable, reusable, and in-line bacteria filters are each designed to trap a different type of contaminant. Depending on the compatibility with your CPAP machine, you may be able to choose the filter or filters that are most relevant to you. |
| Compatibility | Many CPAP machines have proprietary filters, which are the only ones that work with the device. Check the manufacturer’s guidelines to make sure your filter is compatible. Even if a filter has the same shape, using generic models or other brands may cause the filter to work ineffectively and may harm the machine. |
| Price | Disposable filters are usually cheap, but the cost of buying them every few months can add up over time. Some insurance plans may cover the cost of these and other CPAP replacement parts. Alternatively, you may be able to sign up for a subscription plan and save money on the cost per filter. |
| Allergens | Reusable CPAP filters are generally designed to keep out major allergens, such as pollen, dust, and animal dander. If you're particularly sensitive to smaller airborne contaminants such as smoke, consider a machine that uses a reusable filter, which is engineered to catch smaller particles. People prone to sinus or respiratory infections may want to consider adding an in-line bacteria filter. |
| Material Quality | Whereas reusable filters often feature thicker foam to absorb particles, disposable filters may use thin paper or synthetic fiber to attract smaller contaminants. The user guide may state the minimum particle size the filter is capable of trapping, with reusable models generally filtering particles down to 7 microns and disposable filters trapping particles as small as 0.5 microns. |
Filters aren’t always universally compatible, so you’ll need to check to see if the filter you have in mind will work with your CPAP machine. Check your filter for tears or holes regularly too.
Generally, disposable filters need replacing twice a month, and reusable filters should be replaced twice a year. In-line bacteria filters generally need to be replaced once a month. Each manufacturer has its own recommended replacement schedule, so be sure to check the instructions for your model.
Worn or dirty filters cannot clean the air as efficiently, which leaves CPAP users susceptible to airborne contaminants. A clogged filter may also cause the machine to overheat, which can cause damage to the machine or affect the way it works.
| CPAP Filter Type | Replacement Timeline |
| Disposable Filters | 2 weeks |
| Reusable Filters | 6 months |
| In-Line Filters | 1 month |
You may need to change your CPAP filter ahead of schedule if you notice any of these signs:
Households with cigarette smoke, pet dander, or other sources of contaminated air, such as being located in a polluted area, may find that CPAP filters need replacing more frequently than usual.
If you’re using an in-line bacteria filter, you should also check it frequently to make sure there is no moisture buildup, as this could affect the air pressure.
CPAP filters can be purchased directly through Sleep Doctor, making it easy to find replacement filters that are compatible with your specific CPAP machine. Sleep Doctor offers a curated selection of CPAP filters, along with guidance to help you choose the correct type based on your device and therapy needs.
CPAP filters are also available through durable medical equipment providers, specialty CPAP retailers, and general online marketplaces. However, purchasing through Sleep Doctor can simplify the process by combining equipment access with expert support.
Because CPAP filters need to be replaced regularly to maintain airflow and air quality, Sleep Doctor’s delivery and reorder options can help ensure you stay on schedule and keep your therapy running smoothly.
No, a prescription isn't required to buy CPAP filters. Because filters need to be replaced regularly to maintain airflow and air quality, most users can reorder them as needed without additional medical approval.
Insurance coverage for CPAP filters varies by provider and plan. Many insurance policies, including Medicare, consider CPAP filters to be routine replacement supplies and may cover them as part of durable medical equipment benefits when you meet eligibility requirements.
Medicare covers up to two disposable filters per month or one reusable filter every 6 months. Coverage under Medicaid or other insurance plans may vary. Before purchasing CPAP filters, confirm eligibility and the filter replacement schedule with your plan provider.
As a necessary component of CPAP supplies, filters should qualify for purchase through a flexible spending account (FSA) or health savings account (HSA). Check with your plan provider before allocating funds for this use.
