How do I fit the WM 29928?

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.

CPAP machine filter

Löwenstein prisma air filter / coarse dust filter (set of 2)

WM 29928

Fits 4 models · replace every 6 months

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

GenuineGenuine Löwenstein

$4.50 each

2-pack $9.00

CPAP Club · 2 NovLowest genuine · CPAP Club · checked 2 Nov

CompatibleCompatible option

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No compatible seller tracked yetNo compatible seller tracked yet

Genuine: made by Löwenstein. Compatible: another brand.Genuine is made by Löwenstein. Compatible is made by another brand. Check the seller's page for the size and models it fits.

Lowest price · $4.50 each · 2-pack $9.00

CPAP Club. Every seller we track is listed below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.

Open CPAP Club · $4.50 each · 2-pack $9.00

Compare 1 seller

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

Genuine Löwenstein

1 seller

CPAP ClubGenuine · checked 2 NovGenuine part · Lowest genuinechecked 2 Nov$4.50 each2-pack $9.00OpenGo to seller

Open cheapest seller · $4.50 each · 2-pack $9.00

Opens CPAP Club in a new tab. Their page is the source of truth for price, delivery and returns.

How long it lasts

Usually every 6 months (Löwenstein says to clean the grey air filter monthly and replace it every 6 months).

After replacing: No reset step in Löwenstein's prisma manuals.

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 WM 29928 filter

Watch the guide or follow the steps.

prisma SMART max set up video · Löwenstein Medical International (official)

1Turn the machine off and unplug it.
2Remove the grey air filter (and the white pollen filter, if fitted) from the holder.
3Put the new grey air filter, and the white pollen filter if you use one, back into the holder.
4Make sure the filters sit properly in the holder before you start the machine.

Every number this part goes byWM 29928 · WM29928

Retail name:: WM 29928
Retail name:: WM29928

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.

Your appliance model

Fits these 4 Löwenstein modelsprisma 20A, prisma 20C, prisma SMART, prisma SOFT

Löwenstein4 models

Common questionsWhat does the WM 29928 fit? · How often should I replace the WM 29928? · Where can I buy the WM 29928 in Australia?

What does the WM 29928 fit?: The Löwenstein prisma air filter / coarse dust filter (set of 2) (part WM 29928) fits 4 Löwenstein models, including the prisma 20A, prisma 20C and prisma SMART. Every one is listed on this page.
How often should I replace the WM 29928?: Every 6 months. It works less well as the filter fills up, so it's worth doing on time.
Where can I buy the WM 29928 in Australia?: We track 1 Australian seller for the WM 29928; the lowest listed price when we last checked was A$4.50 at CPAP Club. Prices are re-checked daily and dated on this page.
How do I fit the WM 29928?: 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 step in Löwenstein's prisma manuals.

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