Introduction
CPAP machine filters are one of the most straightforward yet frequently overlooked parts of ongoing sleep therapy maintenance. Every ResMed machine draws air from the room, passes it through a filter to remove dust, pollen, and airborne particulates, and then delivers that filtered air through your humidifier and hose to your mask. A clean filter means clean air, consistent airflow, and a motor that is not working harder than it needs to. An overdue filter means the opposite.
Where patients most commonly run into trouble is ordering the wrong filter for their machine. The ResMed AirSense 10 machine filters and the ResMed AirSense 11 machine filters are not interchangeable. They are designed for different machines with different filter housings, and using the wrong filter — or forcing the wrong one into place — will not provide effective filtration. This page explains the differences between the two, confirms which filter belongs with which machine, and covers everything you need to know to keep your replacement schedule on track.
Quick Comparison Overview
| Feature | AirSense 10 Machine Filters | AirSense 11 Machine Filters |
|---|---|---|
| Compatible Machines | ResMed S9 series and AirSense 10 series CPAP, APAP, and BiPAP | ResMed AirSense 11 Auto CPAP and BiPAP only |
| Compatible with AirSense 10 | Yes | No |
| Compatible with AirSense 11 | No | Yes |
| Compatible with S9 Series | Yes | No |
| Compatible with AirMini | No | No |
| Filter Type | Disposable — do not wash or reuse | Disposable — do not wash or reuse |
| Replacement Frequency | Once per month (ResMed recommendation) | Every 30 days (ResMed recommendation) |
| Replace Sooner If | Visibly grey, discoloured, or clogged | Visibly grey, discoloured, or clogged |
| Washable or Reusable | No | No |
| Tool Required for Replacement | No — tool-free | No — tool-free |
Why CPAP Machine Filters Matter
Every breath you take during CPAP therapy is drawn from the room air around your machine, passed through the machine's filter, and delivered to your airway. The filter's job is to catch dust, pollen, pet hair, mold spores, and other airborne particulates before they enter the machine's motor and your therapy airstream.
A clean filter protects two things at once. First, it protects you — ensuring the air delivered during therapy is free of the particulates that could irritate or affect your airway, particularly if you have allergies, asthma, or other respiratory sensitivities. Second, it protects your machine — a clogged filter forces the motor to work harder to pull the same volume of air through a restricted opening, which increases wear on the motor over time and can affect the accuracy of therapy pressure delivery.
ResMed recommends replacing filters on both the AirSense 10 and AirSense 11 on a monthly basis under normal household conditions. In environments with pets, high dust levels, or nearby construction, filters may need replacing more frequently. A quick visual check each month is all that is required — if the filter looks visibly grey or discoloured before the month is up, replace it then rather than waiting.
AirSense 10 Filters — What You Need to Know
The AirSense 10 machine filters are compatible with the full ResMed AirSense 10 series — including CPAP, APAP, and BiPAP models — as well as the older ResMed S9 series. This broader compatibility makes them a practical filter for patients who may be running an S9 and an AirSense 10 in the same household, or for clinics and care providers managing a range of ResMed equipment.
These filters are disposable and single-use. They should not be washed, rinsed, or reused. Washing a disposable filter damages the filtration media and renders it ineffective — a washed filter may appear cleaner but will no longer trap particulates reliably. Replacement is tool-free and takes under a minute. ResMed recommends replacing once per month, or sooner if visual inspection shows the filter is already grey or clogged.
AirSense 11 Filters — What You Need to Know
The AirSense 11 machine filters are designed specifically for the ResMed AirSense 11 Auto CPAP and BiPAP machines. They are not compatible with any other ResMed machine — not the AirSense 10, the S9 series, or the AirMini. The filter housing on the AirSense 11 uses a different design from previous AirSense generations, and the filters reflect that.
Like the AirSense 10 filters, AirSense 11 filters are disposable and must not be washed or reused. ResMed recommends replacement every 30 days, with the same guidance to replace sooner if the filter is visibly clogged or discoloured before the 30-day mark. Replacement is tool-free. Setting a monthly calendar reminder is a simple way to stay on schedule without having to remember manually each month.
At a Glance — Which Filter Do You Need
For AirSense 10 and S9 Users
AirSense 10 Machine Filters
- Compatible with all AirSense 10 series models (CPAP, APAP, BiPAP)
- Also compatible with ResMed S9 series
- Not compatible with AirSense 11 or AirMini
- Disposable — replace monthly, do not wash
- Tool-free replacement
- Replace sooner if visibly grey or clogged
For AirSense 11 Users
AirSense 11 Machine Filters
- Compatible with ResMed AirSense 11 Auto CPAP and BiPAP only
- Not compatible with AirSense 10, S9, or AirMini
- Disposable — replace every 30 days, do not wash
- Tool-free replacement
- Replace sooner if visibly grey or clogged
- Different filter design from AirSense 10 — not interchangeable
Stocking up on filters in advance is a simple and practical step. Having a supply of the correct filters on hand removes the risk of running your machine with a clogged or overdue filter while waiting for a replacement to arrive. Both filter types are available through CPAP Machines Canada. Contact our team to confirm pack quantities and pricing, and to verify the correct filter for your specific machine before ordering.
Frequently Asked Questions
Are the AirSense 10 and AirSense 11 filters interchangeable?
No. The AirSense 10 and AirSense 11 use different filter designs with different filter housings. The two filter types are not interchangeable and should not be used in the wrong machine. Always confirm your machine model before ordering replacement filters. If you have upgraded from an AirSense 10 to an AirSense 11, you will need to switch to the AirSense 11 filter going forward.
How often should I replace my CPAP machine filter?
ResMed recommends replacing filters on both the AirSense 10 and AirSense 11 on a monthly basis — every 30 days — under normal household conditions. If you live in a home with pets, in a dusty environment, or near construction, replace your filter more frequently. Visually inspect the filter at each replacement: if it appears grey, discoloured, or visibly clogged before the month is up, replace it immediately rather than waiting for the scheduled date.
Can I wash and reuse my CPAP machine filter to save money?
No. Both the AirSense 10 and AirSense 11 filters are disposable and should not be washed or reused. Washing a disposable filter damages the filtration media — the filter may look cleaner afterward but will no longer effectively trap dust, pollen, and particulates. A washed filter provides a false sense of security while offering inadequate protection for both the machine's motor and the air you breathe during therapy. Replacement filters are low cost and designed to be replaced on schedule.
What happens if I run my CPAP machine with a clogged filter?
A clogged filter restricts the volume of air that can enter the machine, which forces the motor to work harder to maintain the prescribed therapy pressure. Over time this increases motor wear and can reduce the machine's lifespan. A clogged filter also allows more unfiltered particulates to pass through than a fresh filter, reducing the quality of air delivered during therapy. Monthly replacement is one of the simplest and most cost-effective ways to protect both your machine and your therapy.
Are these filters compatible with the ResMed AirMini travel CPAP?
No. Neither the AirSense 10 filters nor the AirSense 11 filters are compatible with the ResMed AirMini. The AirMini uses its own filter design. Contact CPAP Machines Canada to confirm the correct filter for your AirMini if needed.
I just upgraded from an AirSense 10 to an AirSense 11. Do I need new filters?
Yes. The AirSense 11 uses a different filter design from the AirSense 10, and any remaining AirSense 10 filters you have on hand will not fit or function correctly in the AirSense 11. When upgrading machines, filter replacement is one of the accessories that needs to be updated alongside the machine itself. Order AirSense 11 filters through CPAP Machines Canada to continue your monthly replacement schedule without interruption.
How do I replace the filter on my ResMed machine?
Filter replacement on both the AirSense 10 and AirSense 11 is tool-free and takes under a minute. The filter access point is typically located on the side or back of the machine. Refer to your specific machine's user manual for step-by-step instructions. If you need guidance, contact CPAP Machines Canada and our team will walk you through the process.
Need Help With CPAP Filters or Accessories?
If you are unsure which filter is correct for your machine, want to confirm pack quantities, or have questions about your CPAP maintenance routine, our team is here to help. We can confirm compatibility and help you set up a regular supply schedule so you never run your machine with an overdue filter.
CPAP Machines Canada
Website: cpapmachinescanada.ca
Toll Free: +1 (877) 820-4878
Email: support@cpapmachinescanada.ca
