The Philips Respironics DreamStation Auto BiPAP takes the Philips DreamStation reusable pollen filter (part 1122446) as its filter; replace it every 6 months; Australian sellers list it from A$5.00 as of 1 November 2026. Fitment confirmed against the manufacturer's compatibility list.
Your CPAP machine
Philips Respironics DreamStation Auto BiPAP
CPAP machine
Confirmed against Philips Respironics's listConfirmed against Philips Respironics's own compatibility list
Not yours? ChangeSave it · remind me every 6 months
Takes the 1122446 filter
Philips DreamStation reusable pollen filter · replace every 6 months · check the code printed on your old filter before ordering.
Your CPAP machine
CPAP machine
Confirmed against Philips Respironics's listConfirmed against Philips Respironics's own compatibility list
Takes the 1122446
Filter · every 6 months · check the code on your old filter.
Other Philips Respironics CPAP machines that take the 1122446
GenuineGenuine Philips Respironics
$5.00
CPAP Australia · 1 NovLowest genuine · CPAP Australia · checked 1 Nov
CompatibleCompatible option
$7.00 each
2-pack $14.00
Amazon AU · 28 OctAmazon AU · checked 28 Oct
Check sellerCheck seller details
Genuine: made by Philips Respironics. Compatible: another brand.Genuine is made by Philips Respironics. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest compatibleLowest compatible price · $7.00 each · 2-pack $14.00
Amazon AU. Compare with genuine below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
Other parts this CPAP machine takes
- Philips DreamStation 15 mm standard tubeOpen The CPAP Clinic$20.00
The tubing. Philips lists the 15 mm standard tube (PR15) for DreamStation; T11 machines came with the 15 mm heated tube (HT15) instead. Separate from the filter. Replace every 6 months.
Compare 4 sellers - Philips DreamStation 15 mm heated tubeOpen The CPAP Clinic$65.00
The tubing. Heated tube: needs the DreamStation heated humidifier; machines with a T11 code came with it. Separate from the filter. Replace every 6 months.
Compare 5 sellers - Philips DreamStation humidifier water chamberOpen Easy CPAP$74.90
The water tub. Only with the DreamStation heated humidifier (DSXH); machines with an H11 or T11 code came with it. Separate from the filter.
Compare 4 sellers
Compare 6 sellers
AUD, before delivery. Each price shows when it was checked.
Compatible options
1 seller
Genuine Philips Respironics
5 sellers
Opens CPAP Australia in a new tab. Their page is the source of truth for price, delivery and returns.
Not due yet?
Get a nudge when your filter is due — it's every 6 months. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the filter in your Philips Respironics DreamStation Auto BiPAP
Watch the guide or follow the steps.
- 1Turn the airflow off and unplug the DreamStation.
- 2Lift up the filter access door on the side and swing it open, then pull out the old filter assembly.
- 3If you use the ultra-fine filter, place the dry blue pollen filter on top of a new ultra-fine filter and snap them together.
- 4Put the filter assembly back in the side of the machine and swing the door closed.
Every number this part goes by
- Retail name:
- 1122446
Sellers list any of these; they are the same part.
About your Philips Respironics DreamStation Auto BiPAP
Philips Respironics CPAP machine — DreamStation. Its filter is the Philips DreamStation reusable pollen filter, part 1122446, changed every 6 months.
Other filters the maker lists for this CPAP machine: Philips DreamStation disposable ultra-fine filter (every month). Optional light-blue ultra-fine filter: snaps under the reusable pollen filter; replace every 30 days, Philips says.
Also in this CPAP machine:
- Philips DreamStation 15 mm standard tube (every 6 months). Philips lists the 15 mm standard tube (PR15) for DreamStation; T11 machines came with the 15 mm heated tube (HT15) instead.
- Philips DreamStation 15 mm heated tube (every 6 months). Heated tube: needs the DreamStation heated humidifier; machines with a T11 code came with it.
- Philips DreamStation humidifier water chamber. Only with the DreamStation heated humidifier (DSXH); machines with an H11 or T11 code came with it.
Where the model number is: The model is on the label under the machine and in its settings or information screen. Unplug the machine, and take out the water tub if it has one, before you turn it over.
Fits these 5 Philips Respironics models
Philips Respironics5 models
Common questions
- Which filter fits the Philips Respironics DreamStation Auto BiPAP?
- The Philips Respironics DreamStation Auto BiPAP takes the Philips DreamStation reusable pollen filter (part 1122446). Compatible filters made to the same specification also fit.
- How often should I replace the filter in my Philips Respironics DreamStation Auto BiPAP?
- Every 6 months. It works less well as the filter fills up, so it's worth doing on time.
- Where can I buy the 1122446 in Australia?
- We track 6 Australian sellers for the 1122446; the lowest listed price when we last checked was A$5.00 at CPAP Australia. Prices are re-checked daily and dated on this page.
- How do I fit the 1122446 in a Philips Respironics DreamStation Auto BiPAP?
- No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A blocked filter restricts the air the machine draws in, and a torn one lets dust and pollen through; the manual says when to replace it.
- Is there anything to reset afterwards?
- Nothing to reset: the DreamStation shows a filter reminder every 30 days, but Philips says it is a reminder only and the machine cannot tell when a filter has been changed.
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