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Air Purifier Filters

Ten cartridges, sorted by who is making the compatibility claim.

The job of this categorymatching the model code on the old cartridge. Every listing below is read against that, and the badges go to the ones that answer it most directly.

Purifier filters are shopped by code, not by description. The cartridge you are holding has a code molded or printed on it, and that code is the only thing that reliably identifies what goes back in. Machine names repeat across generations; codes do not.

The listings below split into two groups that are not interchangeable. Genuine manufacturer filters are sold by the company that built the machine. Third-party listings are sold by someone else who states that their cartridge fits. Both can be perfectly serviceable. Only one of them is a statement from the party who designed the airflow path.

Where a listing quotes a capture percentage or names a category of contaminant, that wording belongs to the listing. This site reproduces it as seller wording and does not restate it as a result, a measurement, or a benefit.

Capture percentages in listings are seller claims

Several listings on this page state figures like removal of 99.97% of pollutants, or name categories such as allergens, bacteria and viruses. Those are the words of the listing. This site reproduces them as listing wording and nothing more.

A filter rating measured in a laboratory does not describe what happens in a particular room, and nothing on this site should be read as a health claim, a prevention claim, or a promise of relief from any symptom. For questions about indoor air and health, the EPA publishes general guidance, and questions about your own health belong with a physician.

Compatibility is never inferred from a number

A cartridge named for a Core 300-P is not automatically right for a Core 400S-P because the numbers look related. Model codes in the same family routinely describe different physical parts.

This site only lists the machines a listing names. Where a listing names four variants, four appear. Where it names one, one appears. Nothing is extended by analogy, and no compatibility list here has been extrapolated from a numbering pattern.

Links to Amazon on this page are affiliate links. If you buy through one, this site may earn a commission at no additional cost to you. Nothing on the page was tested here and no product placement was paid for.

How this page is orderedGenuine parts are listed before third-party ones, and within each group the order follows how specifically the listing names the machines it covers.

Genuine manufacturer filters

Sold by the company that built the machine, with the model code stated on the listing.

Code on the cartridge
Levoit Core 300-RF Filter

Levoit Core 300-RF Filter

Core 300-RF is the code printed on the cartridge you are pulling out, and this is the genuine Levoit part carrying it. The listing states it is for the Core 300-P, that it is AHAM Verifide, and that it includes activated carbon. Matching the code beats matching the description of the machine, because Levoit ships several Core models with cartridges that look alike.

What the listing supports, and what it does not
  • The code on the listing matches the code molded into the cartridge, which is the whole test
  • Stated as a genuine Levoit filter rather than a compatible one
  • The listing states AHAM Verifide status
  • Activated carbon is stated as part of the assembly
  • The listing names the Core 300-P specifically, so other Core numbers need their own check
  • Single cartridge, so there is no spare waiting when the indicator comes on
  • Genuine parts usually cost more than the compatible listings on the same page

Best forA Core 300-P where you would rather not think about whether a filter fits.

Check it on Amazon
Two filters, one box
Coway AP-1512HH Filter Set

Coway AP-1512HH Filter Set

  • 2 per box

The AP-1512HH takes two different filters, and this listing states both are in the box: a HEPA filter and a deodorization filter. The listing also names the 200M. Buying the pair together avoids the common outcome of replacing one layer, closing the machine, and finding the other layer is the one that smelled.

What the listing supports, and what it does not
  • Both filter layers the machine uses are stated as included in one purchase
  • The listing names two machines by model number rather than describing them
  • Sold as the manufacturer part rather than a compatible equivalent
  • One order covers a full service instead of half of one
  • Two layers in a set means paying for both even when only one is spent
  • The listing names AP-1512HH and 200M only, so nothing else is covered by it
  • Set contents should be checked against your machine before the old ones come out

Best forA Coway AP-1512HH being serviced properly rather than half-serviced.

Check it on Amazon
Official, two per box
PuroAir 240 Replacement Filter, 2-pack

PuroAir 240 Replacement Filter, 2-pack

  • 2 per box

Stated as the official replacement for the PuroAir 240, and it arrives two to a box. The listing describes a 3-in-1 HEPA filter. Two cartridges per order is the practical difference here: the second one sits on the shelf and the next change happens the day the indicator asks rather than the week after.

What the listing supports, and what it does not
  • Two cartridges per order, so the next replacement is already in the house
  • Stated as the official replacement rather than a compatible listing
  • The listing names one machine, which leaves nothing to interpret
  • A 3-in-1 construction is described in the listing
  • Only the PuroAir 240 is named, so it answers exactly one machine
  • Two-packs cost more up front than a single cartridge
  • A spare stored badly can pick up odors before it ever goes in

Best forA PuroAir 240 owner who does not want to reorder every few months.

Check it on Amazon
Levoit Core 400S-RF Filter

Levoit Core 400S-RF Filter

The genuine cartridge for the Core 400S-P, which is the larger machine in the Core line and takes a correspondingly larger filter. The listing states AHAM Verifide status and activated carbon. Core 400S-RF and Core 300-RF are not interchangeable regardless of how similar the packaging looks on the shelf.

What the listing supports, and what it does not
  • Model code is stated explicitly, so it can be matched against the old cartridge
  • Genuine Levoit part rather than a compatibility claim from a third party
  • AHAM Verifide status is stated in the listing
  • Activated carbon is stated as part of the assembly
  • Fits the Core 400S-P only according to the listing, and will not stand in for a 300-series cartridge
  • A single cartridge per order
  • Larger machines get through filters faster simply because they move more air

Best forA Core 400S-P that needs the part the machine was built around.

Check it on Amazon
Levoit Core 200S-RF Filter

Levoit Core 200S-RF Filter

The genuine cartridge for the Core 200S-P. The listing states AHAM Verifide status and activated carbon, the same wording used across the Core range, which is exactly why the number is the thing to read. A 200S-P and a 300-P are different machines with different cartridges and near-identical filter descriptions.

What the listing supports, and what it does not
  • The model code is stated in the listing and can be checked against the old part
  • Genuine Levoit rather than a seller-asserted compatible fit
  • AHAM Verifide status is stated
  • Activated carbon is stated as part of the assembly
  • Named for the Core 200S-P only, so nothing else in the Core line is covered
  • Single cartridge per order
  • Description reads almost identically to other Core filters, so the code has to carry the decision

Best forA Core 200S-P where the cartridge code has already been read off.

Check it on Amazon
Levoit Core Mini-RF Filter

Levoit Core Mini-RF Filter

The genuine cartridge for the Core Mini-P, the smallest machine in the Core line. The listing states AHAM Verifide status and activated carbon. Small machines tend to live on desks and nightstands where they run constantly, so the schedule matters more here than the size of the cartridge suggests.

What the listing supports, and what it does not
  • Model code is stated plainly for matching against the old cartridge
  • Genuine Levoit part rather than a compatibility assertion
  • AHAM Verifide status is stated
  • Activated carbon is stated as part of the assembly
  • Covers the Core Mini-P only per the listing
  • One cartridge per order in a machine that often runs around the clock
  • The smallest cartridge in the range holds the least material

Best forA Core Mini-P on a desk or a nightstand.

Check it on Amazon
GermGuardian FLT4825 Filter B

GermGuardian FLT4825 Filter B

FLT4825 is the code, and this listing names seven machines it fits: AC4825, AC4300, AC4850, AC4880, AC4900, CDAP4500 and AP2200. That is an unusually long stated list, which makes the code easier to shop but also makes it worth confirming your own model against the listing rather than assuming. The listing claims removal of 99.97% of pollutants; that figure is the seller wording and is reproduced here as such, not as a result.

What the listing supports, and what it does not
  • Seven machines are named by model number in the listing rather than described loosely
  • The FLT4825 code is printed on the part, so matching is straightforward
  • One code covers several generations of the same cabinet according to the listing
  • Widely stocked, which matters when a filter is already overdue
  • The 99.97% figure is a listing claim and should not be read as a measured outcome in your room
  • A long compatibility list is still only as good as the model number on your own machine
  • Single filter per order

Best forA GermGuardian tower whose model number appears on the listing exactly as printed.

Check it on Amazon

What each listing states — Genuine manufacturer filters

  • Levoit Core 300-RF Filter

    Machines the listing names
    Core 300-P
    Cartridges per box
    1
    Activated carbon stated
    Yes
    AHAM Verifide stated
    Yes
    Anything else in the box
    None stated

  • Coway AP-1512HH Filter Set

    Machines the listing names
    AP-1512HH and 200M
    Cartridges per box
    2 filters in the set
    Activated carbon stated
    Not stated
    AHAM Verifide stated
    Not stated
    Anything else in the box
    A deodorization filter alongside the HEPA filter

  • PuroAir 240 Replacement Filter, 2-pack

    Machines the listing names
    PuroAir 240
    Cartridges per box
    2
    Activated carbon stated
    Not stated
    AHAM Verifide stated
    Not stated
    Anything else in the box
    None stated

  • Levoit Core 400S-RF Filter

    Machines the listing names
    Core 400S-P
    Cartridges per box
    1
    Activated carbon stated
    Yes
    AHAM Verifide stated
    Yes
    Anything else in the box
    None stated

  • Levoit Core 200S-RF Filter

    Machines the listing names
    Core 200S-P
    Cartridges per box
    1
    Activated carbon stated
    Yes
    AHAM Verifide stated
    Yes
    Anything else in the box
    None stated

  • Levoit Core Mini-RF Filter

    Machines the listing names
    Core Mini-P
    Cartridges per box
    1
    Activated carbon stated
    Yes
    AHAM Verifide stated
    Yes
    Anything else in the box
    None stated

  • GermGuardian FLT4825 Filter B

    Machines the listing names
    Seven GermGuardian models named
    Cartridges per box
    1
    Activated carbon stated
    Not stated
    AHAM Verifide stated
    Not stated
    Anything else in the box
    None stated

Third-party listings stating compatibility

Fit is asserted by the seller, not by the appliance manufacturer. Read the named model list against your own machine.

Cabiclean Core Mini-RF Compatible Filter, 2-pack

Cabiclean Core Mini-RF Compatible Filter, 2-pack

  • 2 per box
  • Third-party listing

A third-party Core Mini cartridge, two per box, whose listing states compatibility with the Levoit Core Mini-P and mentions included fragrance sponges. The compatibility statement comes from the seller. The fragrance sponges are an addition the genuine part does not have, and whether that is a feature depends entirely on whether anyone in the room wants scent added to the air.

What the listing supports, and what it does not
  • Two cartridges per order for a machine that runs continuously
  • The listing names the Core Mini-P specifically
  • Fragrance sponges are included according to the listing, for those who want them
  • An alternative when the genuine cartridge is unavailable
  • Compatibility is a seller statement, not a Levoit statement
  • Added fragrance is not something everyone wants in a small room
  • Third-party media is not verified against the machine maker specification

Best forA Core Mini-P owner comfortable with a seller compatibility claim and interested in the scent option.

Check it on Amazon
iSingo Core Mini-RF Compatible Filter, 2-pack

iSingo Core Mini-RF Compatible Filter, 2-pack

  • 2 per box
  • Third-party listing

The plainer of the two third-party Core Mini listings: two cartridges per box, and a stated compatibility with Levoit Core Mini-P purifiers with nothing added. No fragrance sponges, no extra descriptions. The compatibility statement is still the seller speaking rather than Levoit.

What the listing supports, and what it does not
  • Two cartridges per order
  • The listing names the Core Mini-P without hedging around a family name
  • No added fragrance components in the pack
  • Straightforward listing with little to misread
  • Compatibility is asserted by the seller and not by Levoit
  • The listing states less about construction than the genuine part does
  • No AHAM Verifide status is stated in the listing

Best forA Core Mini-P where a plain compatible cartridge without extras is what is wanted.

Check it on Amazon

What each listing states — Third-party listings stating compatibility

  • Cabiclean Core Mini-RF Compatible Filter, 2-pack

    Anything else in the box
    Fragrance sponges

  • iSingo Core Mini-RF Compatible Filter, 2-pack

    Anything else in the box
    None stated

To repeat what is said at the top of the page: the Amazon links here are affiliate links and may earn this site a commission. Ordering, badges, and every claim on the page were decided from what the listings state, not from any commercial arrangement.

Questions this category gets asked

Where do I find the model code on my old filter?

It is usually printed on the plastic rim or stamped into the frame of the cartridge itself, and often repeated on a sticker inside the machine behind the filter door. Read it off the part rather than from the machine name on the front panel.

Are third-party filters a problem?

They are a different kind of claim. The seller states the fit; the appliance manufacturer has not. Physical fit, media construction, and how the machine reports filter life are all things the manufacturer has verified for its own part and has not verified for anyone else.

The listing says it removes 99.97% of pollutants. Is that true?

That is the wording of the listing and this site quotes it as such. It is not restated here as a measurement or as a result you should expect in your room, and it is not a health claim of any kind.

My machine takes two filters. Do I replace both?

Follow the manufacturer instructions for the specific machine. Where a set is sold containing more than one layer, the listing states what is included, and the set contents are worth reading before the old parts come out.

How often does a purifier cartridge get changed?

The manufacturer states an interval for each machine, and most machines track running hours and signal when they think it is due. Rooms with pets, smoke, or nearby construction load filters faster than the stated interval assumes.

Where this comes up elsewhere

Sources