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Levoit vs Coway: which air purifier should you buy?

The Levoit Core 400S and the Coway Airmega Mighty (AP-1512HH) are the two most-recommended purifiers for medium rooms. Here's how they compare on cleaning, noise, running costs and features.

Updated November 2026How we compared

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The short answer

For most people, buy the Levoit Core 400S. The two clean a room equally well: in a side-by-side test in the same 320 sq ft room, both cut fine particles by about 96% in an hour. The Levoit is quieter at top speed, uses about half the power flat out, and adds an app, schedules and voice control.

Buy the Coway Airmega Mighty if you want simple and long-lived: no app or Wi-Fi to set up, an Eco mode that switches the fan off when the air is clean, and a 3-year warranty.

Levoit Core 400S on Amazon Coway Airmega Mighty on Amazon

Head to head

	Levoit Core 400S	Coway Airmega Mighty
Rated CADR	260 CFM (Levoit); 247 CFM dust (AHAM)	246 CFM dust, 233 smoke (AHAM)
Room size at about 5 air changes per hour*	about 385 sq ft	about 385 sq ft
Same-room test (320 sq ft, 1 hour, top speed)	PM2.5 down 96%	PM2.5 down 96%
Noise at top speed (same test)	59.9 dBA	63.5 dBA
Power at top speed (same test)	35 W	69 W
Fan settings	Sleep plus 4 speeds, auto mode	3 speeds, auto and Eco mode
Filters	One 3-in-1 cartridge: pre-filter, H13 True HEPA, activated carbon	Washable pre-filter, carbon filter and True HEPA filter, plus an ionizer you can switch off
App and Wi-Fi	VeSync app, Alexa, Google Assistant	None
Warranty	1 year, 2 with registration	3 years

*Calculated the same way for both from the AHAM dust CADR: 4.8 air changes an hour in a room with 8 ft ceilings. Test figures are from Air Purifier First's side-by-side test of both units.

What the differences mean

Cleaning: a tie

Levoit advertises 260 CFM, but AHAM's verified dust figure for the Core 400S is 247 CFM, almost exactly the Coway's 246. Independent testing agrees: Air Purifier First ran both for an hour in the same 320 sq ft room and both cut PM2.5 by about 96%. In its smoke-box test the Levoit cleared the box in 15 seconds and the Coway in 18. For a bedroom or living room up to about 385 sq ft, either will do the job.

Noise and power: Levoit

At top speed the Levoit measured 59.9 dBA and the Coway 63.5 dBA, a difference you will hear. The Coway is slightly quieter on its lowest speed (41.4 vs 43.6 dBA), and the Levoit adds a dedicated sleep mode. Flat out, the Levoit drew 35 W against the Coway's 69 W, so it costs less to run on high.

Smart features: Levoit

The Core 400S connects to the VeSync app for schedules, filter-life tracking and live air quality, and works with Alexa and Google Assistant. The Coway has no app, but its Eco mode turns the fan off after 30 minutes of clean air and back on when it detects pollution.

Warranty and track record: Coway

Coway backs the Mighty for 3 years; Levoit gives 1 year, or 2 if you register. The Mighty has been a reviewers' favorite for years. Coway now also sells the Airmega Mighty2 (AP-1512N), which RTINGS lists as the Mighty's replacement, so you may see both side by side.

The Coway's ionizer

The Mighty's last stage is an ionizer Coway calls Vital Ion. It's CARB certified, so it meets California's ozone limit, and you can switch it off with a button if you'd rather not use it. The HEPA filter does the real work either way.

Which one should you buy?

Buy the Levoit Core 400S if

You want a quieter purifier on high speed
You want app control, schedules or Alexa and Google
You plan to run it hard and want lower power use

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Buy the Coway Airmega Mighty if

You don't want an app or Wi-Fi
You want the longest warranty (3 years)
You like an Eco mode that switches itself off

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For a big living room or open-plan space (500 sq ft or more)

Step up a size in either brand. The Levoit Core 600S has a 410 CFM smoke CADR, enough for about 640 sq ft by our rule, with the same VeSync app. Coway's Airmega 400S is rated at 328 CFM for smoke and dust (about 510 sq ft), pulls air in from both sides, has the Coway app, and Coway covers its motor and electronics for 5 years. The Levoit moves more clean air; the Coway has the longer warranty. See how the 600S does against AirDoctor in Levoit vs AirDoctor.

Levoit Core 600S on Amazon Coway Airmega 400S on Amazon

Questions people ask

Is Levoit or Coway better?

For most people, the Levoit Core 400S. It cleans a medium room as well as the Coway Airmega Mighty (both cut PM2.5 by about 96% in the same 320 sq ft test room), but it's quieter at top speed, uses about half the power on high and adds app and voice control. The Coway wins on warranty (3 years vs 2 with registration) and simplicity.

Which is quieter, the Levoit Core 400S or the Coway Mighty?

On high, the Levoit: 59.9 dBA vs 63.5 dBA in Air Purifier First's test. On the lowest speed the Coway is slightly quieter (41.4 vs 43.6 dBA), but the Levoit also has a dedicated sleep mode for bedrooms.

Is the Coway Mighty's ionizer safe?

The Mighty is CARB certified, which means it meets California's limit on ozone emissions. If you'd rather not use the ionizer at all, you can switch it off with the ion button; the True HEPA filter still does the cleaning.

What's the difference between the Coway Mighty and the Mighty2?

The Airmega Mighty2 (AP-1512N) is Coway's newer replacement for the original Mighty (AP-1512HH), with a slimmer body. RTINGS lists the Mighty2 as the Mighty's successor. Both are sized for medium rooms.

How often do you change the filters?

Both have a filter indicator and are rated for up to about a year of normal use. Vacuum or rinse the pre-filter about once a month to keep airflow up. The Levoit uses one cartridge; the Coway's carbon and HEPA filters come as a set.