5 Best Replacement Filters for Medify MA-40 (October 2026)

The best Medify MA-40 replacement filters include the Medify MA-40 Genuine Replacement Filter for Allergens for a Medify-branded replacement, the FFAC MA-40 Replacement Filter Compatible with MA-40 for a compatible 2-pack, and the EzLfGre Replacement Filter Fit for MA40 Air for a longer suggested interval.

On this page (4 sections)

1. Which Medify MA-40 replacement filter is the best fit?
2. The best replacement filters for Medify MA-40
3. What should you compare before buying an MA-40 filter?
4. Which MA-40 replacement filter should you choose?

The best Medify MA-40 replacement filter for the most direct brand match is Medify Air's genuine filter. If you want a two-filter compatible set, FFAC, EzLfGre and BesReyDa each describe MA-40 fit and include HEPA media with activated carbon.

The right choice comes down to fit, filter layers, pack size and how often you expect to replace it. The Medify Air option is a one-filter pack; several compatible picks include two filters, which can make it easier to keep a spare on hand.

For a broader overview of best air purifier replacement filters, compare filter design and model fit before weighing pack size. This page focuses on MA-40-compatible choices and the details each brand gives about its filter.

Our picks at a glance

1. 1
   Best for a Medify-branded replacement

   Medify MA-40 Genuine Replacement Filter for Allergens

   9.7/10 our score

   See it on Amazon
2. 2
   Best for a compatible 2-pack

   FFAC MA-40 Replacement Filter Compatible with MA-40

   9.6/10 our score

   See it on Amazon
3. 3
   Best for a longer suggested interval

   EzLfGre Replacement Filter Fit for MA40 Air

   9.5/10 our score

   See it on Amazon

4. 4

   BesReyDa 2 Pack 40 Replacement Filter

   Best for a stated 6-month schedule
   Check it
5. 5

   Zouhwaso MA Series 40 Filter Compatible

   Best for checking fit by dimensions
   Check it

Which Medify MA-40 replacement filter is the best fit?

Medify Air's genuine filter is the most straightforward choice when brand and model match matter most. FFAC is the strongest alternative if you want a compatible two-pack with a stated H13 HEPA grade and carbon layer.

We compared the named model compatibility, filter layers, pack sizes and maker-recommended replacement intervals. We did not test these filters, so the scores reflect how closely the stated features fit the needs of an MA-40 owner.

The best replacement filters for Medify MA-40

These Medify MA-40 replacement filter options rank by how clearly they address fit, filter design and ownership planning. Use the comparison details to narrow the list, then confirm your purifier model before ordering.

1

Medify MA-40 Genuine Replacement Filter for Allergens: Best for a Medify-branded replacement

9.7/10Our score

• Medify Air brand
• MA-40 compatibility
• Pre-filter, HEPA and activated carbon
• Maker states up to 3,000 hours or 4–5 months

This is the Medify Air replacement with a stated MA-40 match and a three-layer design. Medify Air describes the HEPA grade as H14 in its feature text, while the material field gives H13.

See it on Amazon

Pros

• Medify Air brand
• MA-40 compatibility is stated
• Includes pre-filter and activated carbon

Cons

• Single-filter pack
• HEPA grade differs between feature text and material field

The Medify Air filter is the clearest choice if you prefer a replacement from the purifier's brand. Its compatibility details name the Medify Air MA-40, and the design combines a pre-filter, HEPA media and activated carbon in one unit.

Medify Air describes its HEPA media as H14 in the feature text, with capture of particles as small as 0.1 microns. The material field identifies True HEPA H13 with active carbon composite, so the grade description is not consistent across the product details.

The pack contains one filter. Medify Air states a life of up to 3,000 hours or 4–5 months of continuous use, which gives you a concrete planning range rather than an open-ended estimate.

This pick suits you if a direct brand match and a stated change schedule matter more than buying multiple filters at once. Before installing it, follow the MA-40 manual's instructions for replacing and resetting the filter.

2

FFAC MA-40 Replacement Filter Compatible with MA-40: Best for a compatible 2-pack

9.6/10Our score

• 2 filters
• H13 HEPA
• Activated carbon pre-filter
• FFAC suggests replacement every 6–12 months

FFAC offers two compatible filters with H13 HEPA and activated carbon. Its stated 6–12 month interval can help you plan changes, though room conditions and use can affect how long a filter lasts.

See it on Amazon

Pros

• Two filters in the pack
• H13 HEPA and activated carbon
• MA-40 compatibility is stated

Cons

• Compatible replacement rather than Medify Air branded
• The stated interval is broad

FFAC is a compatible two-pack with a fine pre-filter, H13 HEPA and activated carbon. Its stated compatibility includes MA-40 air purifiers, and its feature details also name MA40W and MA40B.

FFAC says the HEPA layer can capture 99.7% of suspended solids as small as 0.3 microns. It recommends replacing the filter every 6–12 months, a broad interval that leaves room for differences in use and room conditions.

A two-pack gives you a second replacement to store for the next change. Compare the dimensions and exact model compatibility with your current filter before choosing it, especially if your purifier's model marking includes a suffix.

Pick FFAC if you want a compatible set that states its HEPA grade, carbon layer and replacement interval. Its H13 description is more specific than an option that only says HEPA.

3

EzLfGre Replacement Filter Fit for MA40 Air: Best for a longer suggested interval

9.5/10Our score

• 2 filters
• H13 HEPA
• Granular activated carbon
• Suggested change every 6–8 months

EzLfGre pairs a two-filter pack with H13 HEPA and granular activated carbon. Its stated 6–8 month interval is useful for planning, but check fit and follow your purifier's filter guidance.

See it on Amazon

Pros

• Two filters in the pack
• H13 HEPA and granular activated carbon
• MA-40 compatibility is stated

Cons

• Compatible replacement rather than Medify Air branded
• No filter dimensions are provided here

EzLfGre is another two-pack, with a three-in-one H13 HEPA and granular activated carbon design. The brand says the filter is compatible with the MA-40 air purifier.

EzLfGre recommends a 6–8 month replacement interval. That sits between the shorter schedule from Medify Air and the broader interval FFAC gives, but the intervals come from each brand and are not directly tested against each other.

The available product details do not give filter dimensions. If your MA-40 has a model suffix or you have had fit issues before, compare the exact model name and ask the seller to confirm the fit before you order.

Choose EzLfGre if a two-pack and its stated 6–8 month schedule suit your replacement routine. For a related Medify model, see our guide to best Medify MA-25 air purifier replacement filters.

4

BesReyDa 2 Pack 40 Replacement Filter: Best for a stated 6-month schedule

9.3/10Our score

• 2 filters
• Fine pre-filter, HEPA 13 and activated carbon
• Compatible with MA Air Purifier 40 Series
• Suggested replacement every 6 months

BesReyDa describes its two-filter set as compatible with the MA Air Purifier 40 Series, including 40A, 40B and 40W. It uses a three-stage design with a fine pre-filter and activated carbon.

See it on Amazon

Pros

• Two filters in the pack
• Three-stage design
• Compatibility names several 40 Series models

Cons

• Brand match is less direct than a Medify Air filter
• Compatibility should be checked against your exact purifier

BesReyDa describes a two-filter set for the MA Air Purifier 40 Series, including 40A, 40B and 40W models. Its three-stage design uses a fine pre-filter, HEPA 13 media and activated carbon.

The brand recommends changing the filter every 6 months. Its compatibility description covers more than one 40 Series model, so compare the model printed on your purifier with the model names before buying.

This option is useful if you want an interval that is easy to put on a calendar and a pack with a spare. The available details do not state filter dimensions, so buyers who need a precise size match should verify that separately.

If you are comparing other brand-specific replacements, our best Kenmore air purifier filter replacement options show how the same fit checks apply to another purifier line. For another model-specific comparison, see Austin Air HealthMate replacement filters.

5

Zouhwaso MA Series 40 Filter Compatible: Best for checking fit by dimensions

8.9/10Our score

• H13 HEPA
• Pre-filter and activated carbon
• Size stated as 17.44 x 8.11 x 1.85 in
• Suggested change every 4–5 months

Zouhwaso names MA Series 40 compatibility and gives dimensions to compare with the filter you remove. Its stated replacement interval is 4–5 months.

See it on Amazon

Pros

• Dimensions are provided for fit comparison
• Pre-filter, H13 HEPA and activated carbon
• Suggested interval is stated

Cons

• Compatibility wording names 40W and 40B
• Pack description varies across product fields

Zouhwaso is a compatible MA Series 40 filter with a stated size of 17.44 x 8.11 x 1.85 inches. That makes it the most useful option here if you want to compare the replacement against the filter currently installed.

Its design includes a pre-filter, H13 HEPA and activated carbon. Zouhwaso recommends replacement every 4–5 months and says to reset the purifier by holding the fan speed and ionizer buttons for 3–5 seconds after changing the filter.

The compatibility wording specifically names 40W and 40B. The pack details vary: one highlight says pack of 1, while other fields say two items and a two-count unit, so confirm the quantity before you buy.

Choose this option when its dimensions and model names match your purifier. For another brand-specific guide, compare Blueair 311i Max replacement filters.

For another model-specific comparison, see the best Blueair 211i Max replacement filter.

What should you compare before buying an MA-40 filter?

Compare exact model fit first, then look at filter layers, pack count and replacement guidance. For a Levoit model comparison, see Vital 200S replacement filters.

For another brand-specific guide, compare Coway replacement filters.

These details affect whether a replacement is a practical match for your purifier and your upkeep routine.

How do you confirm Medify MA-40 filter compatibility?

Check the full model name on the purifier and compare it with the replacement's named compatible models. Winix owners can use our 5500-2 replacement filter guide for model-specific options.

Some options here say MA-40, while others refer to the MA Air Purifier 40 Series or specific 40W and 40B models.

A physical size comparison can help when dimensions are available. Zouhwaso gives a size of 17.44 x 8.11 x 1.85 inches, while FFAC gives 8.07 x 17.4 x 1.77 inches; compare orientation and thickness with your removed filter.

Which filter layers matter for everyday use?

A pre-filter, HEPA layer and activated carbon are the common combination across these options. Learn which air purifier filters are washable before cleaning a replacement.

The pre-filter catches larger material, while brands describe the HEPA layer for fine particles and carbon for odor absorption. For Shark-specific care, see whether Shark air purifier filters are washable.

If you're unsure what the first layer does, read what a pre-filter in an air purifier does. Filter stage labels do not tell you the exact performance of a purifier system as a whole.

How should you compare ownership costs without prices?

Start with pack count and the interval each brand recommends, then compare current prices yourself. A two-pack can reduce how often you need to reorder, but it does not prove that the filter costs less per month.

A simple planning estimate is to divide the current pack price by the number of filters, then consider how many months each filter is expected to last. Treat the result as a rough ownership comparison because actual replacement timing depends on use and room conditions.

Why do brands give different replacement intervals?

Replacement guidance differs across the options: 4–5 months from Medify Air and Zouhwaso, 6 months from BesReyDa, 6–8 months from EzLfGre, and 6–12 months from FFAC. These are brand recommendations, not a side-by-side durability test.

Use your purifier's indicator and manual as the main reference. A dusty or smoky room and frequent operation may make you inspect or change a filter sooner.

Which MA-40 replacement filter should you choose?

Choose Medify Air's genuine filter if you want the clearest brand and model match, and choose FFAC if you want a compatible two-pack with H13 HEPA and carbon. EzLfGre suits a 6–8 month suggested interval, BesReyDa offers a 6-month schedule, and Zouhwaso is worth considering when its stated dimensions match your filter.

For general filter checks, start with how to test a HEPA filter at home in 3 steps. Match the model first, then choose the pack and replacement interval that fit your routine.

Our top 3 picks at a glance

1. 1
   Best for a Medify-branded replacement

   Medify MA-40 Genuine Replacement Filter for Allergens

   9.7/10 our score

   See it on Amazon
2. 2
   Best for a compatible 2-pack

   FFAC MA-40 Replacement Filter Compatible with MA-40

   9.6/10 our score

   See it on Amazon
3. 3
   Best for a longer suggested interval

   EzLfGre Replacement Filter Fit for MA40 Air

   9.5/10 our score

   See it on Amazon

Frequently asked questions

How often should you replace a Medify MA-40 filter?

The suggested interval depends on the replacement you choose. Medify Air states up to 3,000 hours or 4–5 months for its genuine filter, while FFAC suggests 6–12 months and EzLfGre suggests 6–8 months.

Check the filter guidance for your purifier and consider how often it runs and the conditions in your room.

Do compatible filters fit every Medify MA-40?

The options here state compatibility with the MA-40 or MA Air Purifier 40 Series, but model names can vary. Check the exact purifier model and compare the replacement's dimensions with the filter you remove before ordering.

BesReyDa names 40A, 40B and 40W, while Zouhwaso specifically names 40W and 40B.

What filter layers should an MA-40 replacement have?

These options describe combinations of a pre-filter, HEPA media and activated carbon. The pre-filter is for larger particles, HEPA media captures airborne particles, and activated carbon is included for odors.

For more on the carbon layer, see what activated charcoal does in an air purifier.

How can you check whether a replacement HEPA filter is working?

Start by checking the filter's fit, installation direction and any purifier alert or reset instructions. A home check can help you look for obvious problems, but it does not certify a filter's grade or capture performance.

Follow our three-step guide to checking a HEPA filter at home for practical checks.