FitMatch
ResMed AirMini hypoallergenic air filter

CPAP machine filter

ResMed AirMini hypoallergenic air filter

38857

Fits 1 model · replace every 6 months

Wrong part, or your model missing? Tell us. A person checks every report.

Genuine

$2.91 each

12-pack $34.90

CPAP Direct · 1 Nov

Compatible

See seller

No compatible seller tracked yet

Genuine: made by ResMed. Compatible: another brand.

Lowest price · $2.91 each · 12-pack $34.90

CPAP Direct. Every seller we track is listed below. Some links earn us a commission.

Open CPAP Direct

Compare 4 listings from 3 sellers

AUD, before delivery. Each price shows when it was checked.

CPAP DirectGenuine · checked 1 Nov$2.91 each12-pack $34.90Open
The CPAP ClinicGenuine · checked 1 Nov$3.25 each2-pack $6.50Open
Easy CPAPGenuine · checked 1 Nov$3.25 each12-pack $39.00Open
Easy CPAPGenuine · checked 1 Nov$11.00 each2-pack $22.00Open
Open cheapest seller · $2.91 each · 12-pack $34.90

Opens CPAP Direct 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.

Also saves the model to a FitMatch account under this address; the email signs you in, no password.

How to change the 38857 filter

Watch the guide or follow the steps.

How to change the ResMed AirMini filter & HumidX humidifier tab · SleepRightAustralia
  1. 1Turn the AirMini off and unplug it.
  2. 2Slide the air filter cover off and remove the old filter.
  3. 3Insert the new hypoallergenic filter.
  4. 4Slide the cover back on.
Every number this part goes by
Retail name:
38857
Retail name:
38858

Sellers list any of these; they are the same part.

Will it fit your appliance?

Type your model number and we'll check it against the makers' lists.

Fits this ResMed model

ResMed1 model

AirMini hypoallergenic filter: the finer alternative to the standard AirMini filter.

Common questions
What does the 38857 fit?
The ResMed AirMini hypoallergenic air filter (part 38857) fits the ResMed AirMini.
How often should I replace the 38857?
Every 6 months. It works less well as the filter fills up, so it's worth doing on time.
Where can I buy the 38857 in Australia?
We track 3 Australian sellers for the 38857; the lowest listed price when we last checked was A$2.91 at CPAP Direct. Prices are re-checked daily and dated on this page.
How do I fit the 38857?
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?
No reset: ResMed's AirMini guide has no filter reminder to clear.

Something looks wrong with the 38857 match? . Reports go to a person, not a bot.