Coway Airmega 400 Air Purifier (AP-2015F)

A large-room, filter-only purifier. CARB lists it as mechanical and ENERGY STAR shows a smoke CADR of 376, above Coway’s own 328. Filters run $129 a year. No AHAM listing or app, and its 3,120 sq ft headline counts one air change an hour.

Best for A large living room or open plan up to about 490 sq ft, for a buyer who wants carbon and HEPA in a mechanical-only machine from a large maker, and does not need an app.

Our rating: Good (4.0 of 5)
Price range: Premium
Verified marks: Listed by CARB as a mechanical air cleaner (AP-2015F), ENERGY STAR certified room air cleaner (AP-2015F); its list shows a smoke CADR of 376 and 0.00 ppb ozone
Size: One purifier for rooms up to about 490 sq ft by our rule from Coway’s smoke CADR of 328 (ENERGY STAR lists 376, about 565 sq ft); 24.7 lb; 14.8 x 22.8 x 14.8 in
Made in: Made in Korea, per the user manual

approx. $649

See it on Coway’s site → (opens in a new tab)

We are not affiliated with Coway. This link goes to the maker’s own page, with no tracking code. How we're funded.

Also sold at Amazon ($630), Walmart ($630) .

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How we evaluated it

How it scores Our rating, metric by metric Good, 4.0 of 5

Filtration 30% of the rating 4 of 5

Coway’s own smoke CADR is 328, ENERGY STAR’s list shows 376 for the same model and RTINGS lists the filter as HEPA certified, but AHAM has no Coway entry and we found no published HEPA report.
Adds nothing to the air 20% of the rating 5 of 5

CARB lists the AP-2015F as mechanical (order G-26-006), ENERGY STAR’s list shows 0.00 ppb ozone and Coway’s manual lists no ionizer or other added stage.
Independent testing 20% of the rating 4 of 5

RTINGS, which buys its units and takes no money from Coway, reviewed it in 2026, while CARB and ENERGY STAR are listings Coway applies for and we found no independent ozone test.
Trust 10% of the rating 4 of 5

We found no recall, Prop 65 notice or lawsuit about Coway purifiers and it gives a 5-year motor warranty, but its 3,120 sq ft headline is a one-air-change figure and its 99.999% nano-particle claim has no report.
Running cost & value 20% of the rating 3 of 5

At about $649 it costs about $1.98 per CFM of Coway’s CADR (about $1.73 on ENERGY STAR’s 376), and four more $129 filter sets bring five years to about $1,165, though Amazon has sold it for far less.

The rating, 4.0 of 5, is the weighted average of these scores. See how we rank air purifiers and our standard.

Where to buy Stores and the prices we saw 2 stores

Amazon (opens in a new tab) approx. $630. Graphite, AP-2015F(G), $629.99 on 2026-11-03. Shipper and seller shown as Amazon.com; 4.6 stars from 1,318 ratings. The White version (B01C9RIACG) lists Sylvane, a third-party seller, first and Amazon.com as another offer.
Walmart (opens in a new tab) approx. $630. White, AP-2015F, $629.99 on 2026-11-03, sold and shipped by Coway USA, Inc., the maker. Best Buy and Target list no Airmega 400.

Prices as we saw them on November 3, 2026. They change often. These links carry no tracking code and earn us nothing.

What it’s made of What touches your food, water, skin or air 2 materials

Two Max2 cartridges, each combining HEPA media with pelletized activated carbon (the media material and carbon weight are not stated), and two washable pre-filters
Housing and fan motor (materials and motor type not stated); no ionizer, UV or scent stage, and no Wi-Fi in this version

Who tested it What each test found, and who paid for it 4 tests

Independent RTINGS (buys its test units; earns membership and affiliate income) June 2026

Reviewed 2026-06-17 and updated 2026-09-22. Lists the filter as HEPA certified in a three-stage design with pelletized activated carbon, praises its high CADR and quiet low speeds, and faults its bulk and lack of Wi-Fi; its footprint score is 6.0 of 10. Its results table, which RTINGS limits for non-members, gives a PM1 CADR of 368 cfm (625 m³/h) at top speed, 117 cfm at the fastest speed that stays under 45 dBA, and noise of 31.6 dBA on the lowest speed and 60.1 dBA on the highest. Open ↗ (opens in a new tab)
Paid certification ENERGY STAR (US EPA program; certification Coway applies for) October 2021

Lists the Airmega 400 (AP-2015F) as a certified room air cleaner, certified 2021-10 and on sale since 2017-04: smoke CADR 376, dust 384, pollen 409 and PM2.5 380, for a 583 sq ft room, 6.02 CFM per watt on smoke, about 366 kWh a year, ozone emissions 0.00 ppb, a fan-and-filter design with no connectivity. Coway’s own page lists lower CADRs (328 smoke, 328 dust, 400 pollen). Open ↗ (opens in a new tab)
Paid certification CARB (certification; Coway pays the lab) January 2026

Listed as Mechanical, notified 2026-01-13 (order G-26-006), as are the 400S (AP-2015E) and the 300 models. It tests ozone emission and says nothing about particle removal. Open ↗ (opens in a new tab)
Maker’s own test Coway (maker)

Lists smoke, dust and pollen CADRs of 328, 328 and 400, and says the HyperCaptive filtration traps 99.999% of particles down to 0.01 µm. AHAM does not list Coway and we found no report behind the filter claims. Open ↗ (opens in a new tab)

Who paid, and why it matters

Independent The tester took no money from the maker for it: a consumer group, a journalist, a university or a regulator.
Paid certification An outside lab or certifier tested or listed it, and the maker paid for that.
Maker’s own test A lab report or certificate of analysis the maker commissioned and published.

A certification is a floor, not a verdict: it checks what its program checks and nothing else. We weigh tests by someone with no stake in the result most.

What people ask Worries raised online and elsewhere, and what we found 7 questions

Does it have an ionizer or make ozone?: No. CARB lists the AP-2015F as Mechanical, ENERGY STAR’s list (opens in a new tab) shows 0.00 ppb ozone, and Coway’s manual (opens in a new tab) describes only pre-filters and Max2 filters. CARB lists the older Mighty (AP-1512HH) as Electronic; see our Mighty2 page for the version without it.
Does it really clean 3,120 sq ft?: No. Coway’s page (opens in a new tab) shows 3,120 sq ft at one air change an hour and 1,560 sq ft at two. By its smoke CADR of 328, our two-thirds rule gives about 490 sq ft, and by the 376 on ENERGY STAR’s list about 565 sq ft. See how to size a purifier.
Is the filter true HEPA, and does it trap 99.999% of nanoparticles?: Coway’s page (opens in a new tab) says its filtration captures 99.999% of particles down to 0.01 µm and its Walmart listing (opens in a new tab) calls the filter True HEPA. RTINGS lists it as HEPA certified. We found no published report for either claim, and the footnote to the 99.999% figure did not display for us. We count both as the maker’s word.
Will it last?: We found no independent durability test. Amazon shows 4.6 stars from 1,318 ratings for the Graphite version. Coway’s manual (opens in a new tab) gives 5 years on the motor and electronic parts of the 400 and 1 year on other internal parts, and Coway’s resale policy (opens in a new tab) limits that cover to new units from Coway or its authorized sellers.
Does the filter contain PFAS?: Coway does not say what its HEPA media or housing are made of, and we found no published PFAS test of purifier filter media from any maker. We could not confirm either way.
Any recall, Prop 65 notice or lawsuit?: None found. The California AG’s notice search (opens in a new tab) returned no 60-day notice naming Coway on 2026-11-03, CPSC’s recall search has no Coway record, openFDA lists no Coway enforcement record, and a web search for suits about Airmega purifiers found none. Reddit was closed to our tools, so we could not read owner threads.
How does it compare with the Sans purifier?: RTINGS reviewed both in 2026. It lists the Airmega 400’s filter as HEPA certified and Sans’s as not, and its results table gives 368 cfm for the Airmega against 230 cfm for Sans. Sans has an internal UV-C stage and CARB lists it as Electronic (G-22-145).

Why we chose it What put it on our list 5 points

CARB lists the AP-2015F (Airmega 400) as Mechanical (notified 2026-01-13, order G-26-006). By CARB’s definition that means filtration only, with no ozone or ions. Coway’s manual describes only pre-filters and Max2 filters, and ENERGY STAR’s list shows 0.00 ppb ozone for the model.
Coway publishes a smoke CADR of 328 (dust 328, pollen 400). ENERGY STAR’s certified list shows more for the same model number: smoke 376, dust 384, pollen 409 and PM2.5 380, for a 583 sq ft room. RTINGS, which buys what it tests, reports a PM1 CADR of 368 cfm at top speed. So Coway’s own figure looks cautious. Our two-thirds rule turns 328 into about 490 sq ft and 376 into about 565 sq ft.
Each side of the unit holds a washable pre-filter and a Max2 cartridge that combines HEPA media with activated carbon. RTINGS lists the filter as HEPA certified and the carbon as pellets, not a thin sheet.
Running cost is published: the two-cartridge Max2 set is $129 and rated one year in Coway’s spec table, and a pre-filter is $35 if you ever replace one. The motor and electronics carry a 5-year warranty, other internal parts 1 year.
Coway rates it at 22 to 52 dB(A). RTINGS lists quiet operation at lower fan speeds among its pros and reports 31.6 dBA on the lowest speed and 60.1 dBA on the highest.

Trade-offs What to weigh before you buy 8 points

AHAM’s directory lists no Coway. The third-party record is ENERGY STAR’s certified list, which shows higher CADRs than Coway’s own page, so that page looks cautious or out of date. ENERGY STAR is a listing Coway applies for, not an independent test.
The headline is “3,120 sq ft in 60 minutes”, which is one air change an hour. Coway’s spec table also shows 1,560 sq ft at two. By the CADR it is a room of about 490 sq ft on Coway’s number and about 565 sq ft on ENERGY STAR’s.
Coway’s pages say the filters capture 99.999% of particles down to 0.01 µm, and its Walmart listing calls the filter True HEPA. The footnote behind the 99.999% claim did not display for us, and we found no published report or EN 1822 class for either claim. RTINGS lists the filter as HEPA certified.
At about $649 it costs about $1.98 per CFM of Coway’s CADR (about $1.73 on ENERGY STAR’s 376), a little more than the Oransi Mod+ (about $1.93, with an AHAM-listed CADR of 363) and well above the Levoit Eleva 500X (about $0.86). Over five years with four $129 filter sets it is about $3.55 per CFM of 328.
Coway’s spec table rates the Max2 set for one year, but a bullet on the same page says 6 to 12 months, so plan on $129 to $258 a year.
The price swings. A Slickdeals post logged this model on Amazon at $388.99 on 2026-08-21 (the deal has expired), against $629.99 there on 2026-11-03.
Coway’s warranty covers only new units bought from Coway or its authorized sellers, and its resale policy bars sales on Amazon, Walmart and other marketplaces without written consent. Check a third-party seller before you buy.
This version has no Wi-Fi or app; the 400S (AP-2015E, also CARB mechanical) adds them. It is bulky, and RTINGS rates its footprint 6.0 of 10.

What to know Details worth knowing first

The Airmega 400 is a tall column with a washable pre-filter and a Max2 cartridge on each side. Each cartridge combines HEPA media with a bed of carbon pellets. That is the design our air purifier guide points to: filters do the work and nothing is added to the air. CARB’s list carries the model number as mechanical, and ENERGY STAR’s list shows no ozone.

Its strength is that someone other than Coway has put a number on it. Coway’s smoke CADR is 328; ENERGY STAR’s certified list shows 376 for the same model, and RTINGS reports 368 cfm at top speed. That makes it a living-room machine for roughly 490 to 565 sq ft by our rule, not the 1,560 or 3,120 sq ft in the marketing, which count two air changes an hour or one.

Be clear about what is not checked. AHAM has no Coway entry, the HEPA and 99.999% filter claims come from Coway with no report we could open, and carbon covers gases only to the extent of its weight, which Coway does not state; see indoor pollutants and our look at whether purifiers improve health. At about $649 and $129 a year for filters it costs about as much per unit of clean air as the Oransi Mod+ and far more than the Levoit Eleva 500X, though Amazon has sold it for far less, so choose it for the third-party CADR record, the carbon and the long motor warranty, and watch the price.

What we checked Each claim, and how sure we are of it 5 checks

How Coway Airmega 400 Air Purifier (AP-2015F) measures up against our air purifiers criteria
What we checked	What we found
True HEPA (H13) Maker’s claim	Coway’s pages say 99.999% of particles down to 0.01 µm and its Walmart listing says True HEPA; RTINGS lists the filter as HEPA certified. We found no report and no EN 1822 class.
No ozone (CARB listing) Verified	CARB’s list has Coway Airmega 400 (G) and (W), models AP-2015F(G) and AP-2015F(W), as type Mechanical, notified 2026-01-13, order G-26-006. ENERGY STAR’s list shows 0.00 ppb ozone for AP-2015F. The manual lists no ionizer.
Right size (CADR) Verified	Coway lists smoke 328, dust 328, pollen 400. ENERGY STAR’s list gives smoke 376, dust 384, pollen 409 and PM2.5 380 for a 583 sq ft room, and RTINGS reports a PM1 CADR of 368 cfm. No Coway entry in AHAM’s directory. Two-thirds rule: about 490 sq ft on Coway’s figure, about 565 sq ft on ENERGY STAR’s.
Carbon for gases Maker’s claim	Each Max2 cartridge combines pelletized activated carbon with the HEPA media, and RTINGS lists the carbon as pellets. The weight of carbon is not stated.
Running cost and noise Maker’s claim	Max2 set of two $129, rated one year in the spec table (a bullet on the same page says 6 to 12 months); pre-filters washable ($35 each to replace). 66 W and 22 to 52 dB(A) per Coway; ENERGY STAR estimates about 366 kWh a year; RTINGS reports 31.6 to 60.1 dBA.

What the labels mean

Verified We opened an independent record that confirms it: a certifier’s listing, a regulator’s list or a lab report. It is linked under Sources.
Maker’s claim The maker says so on its own page or label. We read it but found no independent record.
Not verified We looked and could not confirm it, or the maker does not say. Treat it as unknown.

Sources Where our facts come from 14 sources

Coway Airmega 400 product page: price, CADR, filters and noise. Maker’s page. $649, specifications and coverage figures as seen 2026-11-03. Open ↗ (opens in a new tab)
Coway Airmega 400 and 400S Max2 filter set. Maker’s page. $129 for the set of two, in Coway’s store on 2026-11-03; the 400 pre-filter is $35 there. Open ↗ (opens in a new tab)
Coway Airmega 300, 300S, 400 and 400S user manual. Maker’s page. Lists model AP-2015F, 66 W, Made in Korea, and the limited warranty (5 years on motor and electronic parts of the 400, 1 year on other internal parts, new units from authorized sellers only). Open ↗ (opens in a new tab)
Coway authorized resale policy. Maker’s page. Bars resellers from selling on Amazon, Walmart and other online marketplaces without Coway’s written consent. Open ↗ (opens in a new tab)
ENERGY STAR certified room air cleaners: Airmega 400 (AP-2015F). Certifier or regulator listing. Smoke CADR 376, dust 384, pollen 409, PM2.5 380, room size 583 sq ft, ozone 0.00 ppb, certified 2021-10; the data file was updated 2026-11-02. Open ↗ (opens in a new tab)
RTINGS: Coway Airmega 400 review. Test report. Reviewed 2026-06-17 and updated 2026-09-22. RTINGS buys its units and earns membership and affiliate income; its detailed results are limited for non-members. Open ↗ (opens in a new tab)
RTINGS: Sans Air Purifier review. Test report. Used for the comparison with Sans: filter not HEPA certified, internal UV-C light, carbon pellets. Open ↗ (opens in a new tab)
CARB list of certified air cleaning devices (search for Coway). Certifier or regulator listing. Airmega 400(G) and (W) AP-2015F are type Mechanical (order G-26-006). Sans is listed as Electronic (G-22-145). Open ↗ (opens in a new tab)
AHAM Verifide directory (search for Coway). Certifier or regulator listing. Its public API lists 59 brands, none of them Coway (checked 2026-11-03). Open ↗ (opens in a new tab)
Coway Airmega 400 on Amazon (Graphite, AP-2015F(G)). Independent source. $629.99 on 2026-11-03, shipper and seller Amazon.com, 4.6 stars from 1,318 ratings. Open ↗ (opens in a new tab)
Coway Airmega 400 on Walmart (White, AP-2015F). Independent source. $629.99 on 2026-11-03, sold and shipped by Coway USA, Inc.; the title says True HEPA and 5-year warranty. Open ↗ (opens in a new tab)
Slickdeals: Coway Airmega 400 at $388.99 on Amazon (2026-08-21). Independent source. An expired deal post. Shows how far the Amazon price moves from the $629.99 seen on 2026-11-03. Open ↗ (opens in a new tab)
California AG Prop 65 notice search: Coway. Certifier or regulator listing. No matching records on 2026-11-03. Open ↗ (opens in a new tab)
CPSC recall search: Coway. Certifier or regulator listing. No records on 2026-11-03. Open ↗ (opens in a new tab)

Alternatives Other options to compare 4 options

Oransi Mod+ About $700, AHAM smoke CADR 363 for rooms up to about 540 sq ft, with HEPA and carbon in one filter and an AHAM listing you can search.
Levoit Eleva 500X About $260, AHAM smoke CADR 301 (about 450 sq ft) and a CARB mechanical listing. It is new, and no independent tester has measured it yet.
Coway Airmega Mighty2 About $270, smoke CADR 240 that RTINGS and HouseFresh measured at 237 and 260 cfm, for rooms up to about 360 sq ft.
Coway Airmega 400S (opens in a new tab) The same machine with Wi-Fi and an app. CARB lists it as mechanical too (AP-2015E).

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