How often should I replace the MA-40 filter?

Medify rates it for about 3,000 hours, or roughly four months of normal use. Replace sooner if you run the purifier constantly or smoke is present.

Does it fit only the Medify Air MA-40?

Yes. It is made for the MA-40 purifier and is not sized for other Medify models.

What does the three-stage filtration remove?

The pre-filter catches hair, fibers and dander; the HEPA H13 layer captures particles down to 0.3 microns; the carbon pellets absorb odors and smoke.

Is it worth choosing over a generic filter?

The genuine filter matches the MA-40's rated performance and uses a substantial carbon layer. Generic filters often use less carbon, so odor control can suffer.

Open the purifier's filter compartment, remove the old cartridge and slide the new one in. No tools are needed.

Does it come with anything else?

It is a single replacement cartridge combining the pre-filter, HEPA and carbon stages.

Where is the MA-40 Filter cheapest?

At Amazon, for $24.99, 58% under what the other stores charge, as of our latest check.

What do buyers say about the MA-40 Filter?

Rated 4.9 out of 5 from 1,008 ratings.

Where can I buy the MA-40 Filter?

15 stores we checked sell it, including Amazon, Lowe's, Darby Dental Supply, Air Purifiers and Cleaners.com, Medify Air.

MA-40 Filter

Best price now

$24.99at AmazonChecked 10 h ago

58% under what the other stores charge

Compared across 15 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

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What reviewers say

4.9 / 51,008 ratings

Owners of the MA-40 rate this filter very highly, with 4.9 out of 5 across more than a thousand ratings. Most praise the fit, the odor control and the fact that it restores airflow and cleaning performance. Complaints center on replacement frequency and cost.

What people mention

FitPraisedOwners say it drops straight into the MA-40 with no gaps or trimming.
Odor removalPraisedReviewers report the carbon stage clears smoke, cooking and pet smells.
AirflowPraisedA fresh filter restores strong airflow and cleaning performance.
Replacement costCriticisedBuyers dislike paying for a new filter roughly every four months.
BuildPraisedOwners describe it as sturdier than cheap third-party filters.

About the MA-40 Filter

This is a genuine replacement filter for the MA-40 air purifier. It uses three stages of filtration: a pre-filter, a HEPA H13 filter and an activated carbon filter.

The pre-filter captures hair, fibers and large particles such as dander. The HEPA filter removes airborne particles down to 0.3 microns. The carbon filter uses carbon pellets to remove odors and smoke.

The filter should be replaced after 3,000 hours, or about four months of use. It installs easily in the purifier.

Compatibility

MA-40 air purifier

Filter type

HEPA (H13)

Filtration stages

Pre-filter, HEPA filter, activated carbon filter

Materials

HEPA filter material; carbon filter with carbon pellets

Particle removal

99.9% of particles from 0.3 to 0.1 microns

CADR