Best CPAP Filters of 2026

UPDATED
Written by Garen Glazier
Reviewed by Michael J. Breus, PhD

Sleep Doctor independently selects the products we test. We may earn a commission if you buy through the links on our site.

Filters are an integral part of your CPAP therapy, helping keep out contaminants like dust or mold before they reach your lungs. A clean filter also helps ensure proper functioning of the machine and may extend its lifespan.

The two most common types of CPAP filters are reusable filters and disposable filters. Reusable filters excel at trapping larger particles such as pollen or animal dander, while disposable filters target smaller particles like smoke.

Below, we’ll explore how CPAP filters work and factors to consider when selecting a filter, including your personal needs and your CPAP machine model. We’ll also share our recommendations for the best CPAP filters available today.

Our Top Picks

Best for ResMed Machines

ResMed AirCurve and AirSense 10 Replacement Filters

ResMed AirCurve and AirSense 10 Replacement Filters
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ResMed AirCurve and AirSense 10 Replacement Filters are designed to keep out mold and other allergens while you sleep.

Price $11
Filter Type Disposable
What’s Tncluded 2 filters
Replacement Schedule Monthly
Pros
  • Affordable
  • Compatible with several ResMed devices
  • Subscription available
Cons
  • Designed exclusively for ResMed machines
  • Not washable
  • Not intended to trap the smallest particles

ResMed disposable filters come in a convenient two-pack and are designed for monthly replacement, though the company recommends checking them at least every 2 weeks to ensure they're still performing optimally.

These filters are designed to be used with the ResMed AirSense 10 and AirCurve 10 series, including the AirCurve 10 VAuto BiPAP machine, the AirSense 10 AutoSet, and the AirCurve 10 ASV device.

When purchased through Sleep Doctor, these filters are available as a one-time purchase or you can opt for a subscription plan and have two filters delivered every 60 days at a slight discount.

Best for Travel

ResMed Replacement Fine Filters for AirMini

ResMed Replacement Fine Filters for AirMini
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Made of polyester fiber, these filters are crafted to fit seamlessly with the ResMed AirMini device.

Price $8
Filter Type Disposable
What’s Tncluded 2 filters
Replacement Schedule Monthly
Pros
  • Specifically designed for the ResMed AirMini portable CPAP machine
  • Fine mesh designed to keep out smaller particles
  • Subscription available
Cons
  • Slightly higher price point
  • Only compatible with the AirMini CPAP device
  • Cannot be washed

The ResMed AirMini is ideal for use when traveling. While ResMed recommends replacing its disposable filters monthly and checking them every 2 weeks for wear or clogging, the filters may last longer if the machine is only used occasionally while traveling.

Sleep Doctor sells the filters in a two-pack that’s available as a one-time purchase or as part of a subscription plan with automatic delivery every 6 months.

Best for Transcend Machines

Transcend 3 Somnetics Filter Assembly

Transcend 3 Somnetics Filter Assembly
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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.

Price $6
Filter Type Reusable
What’s Included 1 filter assembly
Replacement Schedule Every 6 months
Pros
  • Available as a 3- or 6-month subscription
  • Competitively priced
  • Sold with filter mount
Cons
  • Designed to trap larger particles only
  • Only compatible with the Transcend 3 device
  • Sold as entire filter assembly, adding unnecessary waste

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.

In contrast to other manufacturers who sell just the foam filter, Transcend has opted to sell this filter together with the mount. This makes replacement easy, since all you need to do is remove the entire piece and slot the new one in its place. The filter only needs replacing every 6 months, although you should check it periodically and replace it earlier if you notice the foam starting to break down.

If purchased through Sleep Doctor, you can choose a one-time purchase for this filter or sign up for a subscription, with delivery every three or six months.

Best for Luna Machines

Luna G3 Disposable Filter

Luna G3 Disposable Filter
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If you have a Luna G3 machine, you can choose between the standard reusable filter or a disposable alternative.

Price $5-$12
Filter Type Disposable
What’s Included 2 or 6 filters
Replacement Schedule Every 2 weeks
Pros
  • More effective at fine particle filtration than the standard Luna reusable filter
  • Better option for those sensitive to tobacco smoke
  • Available in a pack of two or six
Cons
  • Higher ongoing cost compared with Luna reusable filters
  • Not washable
  • Requires more frequent replacement

These disposable filters feature a finer composition capable of trapping smaller particles in order to deliver cleaner air. While many PAP machines are designed specifically for use with a disposable or a reusable filter, Luna manufacturer React Health (formerly 3B Medical) gives users the choice between either option. While these disposable filters require more frequent replacement, they don’t need to be washed.

When purchased through Sleep Doctor, you can set up a recurring subscription, delivered every 1, 3, or 6 months at a 15% discount.

Best for iBreeze Machines

Sunset Resvent iBreeze Replacement Air Filters

Sunset Resvent iBreeze Replacement Air Filters
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This disposable air filter helps keep out major allergens and irritants.

Price $6
Filter Type Disposable
What’s Included 1 filter
Replacement Schedule Every 2 to 4 weeks
Pros
  • Easy to install
  • No need to clean
  • Compatible with both CPAP and BiPAP Resvent iBreeze models
Cons
  • Only one filter per pack
  • Higher price point than other disposable filters
  • Not washable

With an easy-to-use design featuring a simple rectangular shape, it’s a great option if you use a Resvent iBreeze CPAP or BiPAP machine. As a disposable filter, this model should be replaced at least once per month, or sooner if it shows signs of discoloration. Since it’s white, it should be easy to see if the filter has accumulated residue.

If you buy these filters through Sleep Doctor, you have the option to subscribe for automatic delivery every 30, 60, or 90 days at a 15% discount.

How We Make Our Picks

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.

What Does a CPAP Filter Do?

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.

What Types of CPAP Filters Are Available?

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.
  • Easier to keep clean
  • Keep out smaller particles
  • Cost of buying disposable filters can add up over time
  • Cannot be cleaned
Reusable Filters Disposable filters are made of thin, paper-like mesh material that holds an electrostatic charge to attract tiny particles.
  • Less frequent replacement schedule, meaning lower maintenance costs
  • Tend to generate less waste
  • Must be cleaned regularly
  • May not trap the smallest particles

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.

How to Choose a CPAP Filter

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.

How Often Should You Replace Your CPAP Filter?

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

Signs Your CPAP Filter Should be Replaced

You may need to change your CPAP filter ahead of schedule if you notice any of these signs:

  • Holes, tears, discoloration, or visible debris on the filter
  • Signs of wear, such as the foam breaking down
  • Louder noise than usual
  • Irritated nose, throat, or eyes
  • Warmer-than-usual airflow
  • Ineffective CPAP therapy

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.

Where to Buy CPAP Filters

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.

Do You Need a Prescription to Buy CPAP Filters?

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.

Does Insurance Cover CPAP Filters?

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. 

Can You Use an FSA or HSA to Buy CPAP Filters?

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.

Frequently Asked Questions

How much do CPAP filters cost?

Reusable filters cost around $6 to $20, while disposable filters generally run between $2 and $6 per unit. In-line bacteria filters may set you back around $5. Buying more than one filter at a time may lower the cost per filter.

How do you clean a reusable CPAP filter?

To clean a reusable CPAP filter, unplug the machine, locate the filter door on the back or side of the machine, and remove the filter. Wash the filter under running water or with mild soap and warm water, then gently shake or squeeze out the excess water. Let it dry fully before reassembling the filter and inserting it back into the machine. 

You should repeat this cleaning process at least once a week. Check the user guide for cleaning instructions specific to your model.

Can you use a CPAP machine without a filter?

CPAP machines should not be used without a filter. Since the device takes air from the surrounding environment, the filter is important for removing contaminants before you inhale them, and for ensuring the proper functioning of the machine.

References

  1. https://pubmed.ncbi.nlm.nih.gov/18198803/
  2. https://oig.hhs.gov/oei/reports/oei-07-12-00250.pdf
  3. https://pmc.ncbi.nlm.nih.gov/articles/PMC9364751/

About the Author

Staff Writer, Product Testing Team

Garen Glazier

Staff Writer, Product Testing Team

Position: Side sleeper

Temperature: Neutral sleeper

Chronotype: Wolf

Garen is a health and lifestyle content creator. She realized the importance of sleep when her children made getting a good night's rest more challenging. Garen is always learning something new about the wide world of sleep and sleep products. Married with two girls, ages 7 and 11, she is a book nerd and a lover of pop music, travel, and the Pacific Northwest.

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