Blueair vs Levoit vs Coway: Which Air Purifier Brand Is Better?

For most rooms, buy Levoit: the Vital 200S is AHAM-certified for 388 sq ft, with no ion generator. Blueair's 311i Max covers 439 sq ft on the least power, about $49 a year. Coway's best seller, the Mighty, is rated only by Coway; its Airmega 350 is ENERGY STAR certified.[1]

Levoit Vital 200S

Levoit pick, best value · Most living rooms and bedrooms, up to about 390 sq ft

Levoit Vital 200S

Check price on Amazon

250 smoke CADR · 388 sq ft (AHAM) · filters about $67/yr · power about $86/yr

  • Our pick for most living rooms and bedrooms on our best air purifier page.
  • No ion generator: AHAM lists it as a fan with a filter, so nothing electronic is in the air path.
  • The trade-off: it draws 52.4 W, about $86 a year running all day, so it costs more to run than the Blueair.
  • Sold by Amazon.com.
Blueair Blue Pure 311i Max

Blueair pick, lowest power bill · A bedroom or office up to about 440 sq ft

Blueair Blue Pure 311i Max

Check price on Amazon

283 smoke CADR · 439 sq ft (AHAM) · filters about $60/yr · power about $49/yr

  • It draws only 29.6 W, so power is about $49 a year running all day: the lowest of the 8 models here.
  • The trade-off: Blueair says the filter lasts up to 9 months ($44.99, about $60 a year), and AHAM lists it with an ion generator.
  • Sold by Amazon.com.
Coway Airmega 350

Coway pick · A big living room, up to about 560 sq ft

Coway Airmega 350

Check price on Amazon

360 smoke CADR · 558 sq ft (ENERGY STAR) · filters about $89/yr · power about $97/yr

  • The Coway our Coway page picks for most rooms. ENERGY STAR certified.
  • Coway says its filter set lasts 1+ year and lists 21.5 dB on low, the quietest low setting of the 8. No ionizer.
  • The trade-off: for a room this size, the Levoit Core 600S is certified for more (606 sq ft) and costs less.
  • Sold by Amazon.com.

Prices are Amazon's on November 10, 2026. Every pick is sold by Amazon.com and has a certified CADR. They match the picks on our best air purifier, Levoit and Coway pages.

The three models ChatGPT names, checked

Asked "Blueair vs Levoit vs Coway", ChatGPT calls Coway the best overall, Levoit the best value and Blueair the quiet choice, and names one model for each. Here is each one with its certified (or maker) numbers.

  • Coway Airmega Mighty (AP-1512HH)

    ChatGPT: best for a medium bedroom or living room

    Coway Airmega Mighty (AP-1512HH) · 233 smoke CADR · 361 sq ft (Coway's figures) · filters about $60/yr · power about $127/yr

    Neither AHAM's directory nor ENERGY STAR's list includes it, so its numbers are Coway's own. It draws 77 W, the most of the 8 here, and Coway lists a bipolar ionizer. Coway's 350 (above) is the certified choice. Full review.

    Check price on Amazon
  • Levoit Vital 200S

    ChatGPT: best for pets or a larger living area

    Levoit Vital 200S · 250 smoke CADR · 388 sq ft (AHAM) · filters about $67/yr · power about $86/yr

    Our living-room pick (see above). It has a pet mode and a washable pre-filter for hair. Full review.

  • Blueair Blue Pure 311i Max

    ChatGPT: best for a bedroom or home office where low noise matters

    Blueair Blue Pure 311i Max · 283 smoke CADR · 439 sq ft (AHAM) · filters about $60/yr · power about $49/yr

    Our lowest-power pick (see above). On quiet, the makers' own low settings are close: Blueair lists 23 dB, Levoit 23 dB for the Vital 200S and Coway 24 dB for the Mighty. Full review.

Models from ChatGPT's answer to "Blueair vs Levoit vs Coway", asked October 24, 2026, matched to Amazon listings by model number.

Which one is right for your room?

  • A small bedroom, up to about 220 sq ft

    Levoit Core 300 · AHAM: 222 sq ft · filters about $45/yr

    The cheapest of the 8 to buy and to keep in filters. It draws 55.4 W, so power is about $91 a year.

    Check price on Amazon

  • A living room or bedroom, up to about 390 sq ft

    Levoit Vital 200S · AHAM: 388 sq ft · no ion generator

    Our pick for most rooms (see above).

  • Lowest running cost, up to about 440 sq ft

    Blueair Blue Pure 311i Max · AHAM: 439 sq ft · power about $49/yr

    The least power of the 8 (see above).

  • A large room, up to about 600 sq ft

    Levoit Core 600S · AHAM: 606 sq ft · 391 smoke CADR

    No ion generator.

    Check price on Amazon

  • A big open-plan room, up to about 690 sq ft

    Blueair Blue Pure 211i Max · AHAM: 674 sq ft · 44 W

    Coway's Airmega 450 is certified for a little more (687 sq ft), but the 211i Max costs $150 less and draws 22 W less. Its filters run about $93 a year.

    Check price on Amazon

  • You want no ionizer at all

    Levoit Vital 200S · Levoit: all 3 here · Coway: Airmega 350 and 450

    AHAM lists both Blueairs with an ion generator, and Coway lists one in the Mighty. The three Levoits and Coway's 350 and 450 have none.

By Erin Rose · Updated

01 / Brand by brand

Brand by brand: what each is best for

Levoit

Best value. The lowest prices of the three, AHAM certification across the range, and no ion generator in these models. Trade-off: the Core 300 and Vital 200S draw more power for their size than the Blueairs (55.4 W and 52.4 W vs 29.6 W).[1][7]

  1. 143 smoke CADR · 222 sq ft (AHAM) · filters about $45/yr · power about $91/yr. Full review.
  2. 250 smoke CADR · 388 sq ft (AHAM) · filters about $67/yr · power about $86/yr. Full review.
  3. 391 smoke CADR · 606 sq ft (AHAM) · filters about $60/yr · power about $108/yr. Full review.

Blueair

Most clean air per watt. Both are AHAM-certified and ENERGY STAR, and the 311i Max costs the least to run of the 8. Trade-off: Blueair says its filters last up to 9 months, so a year of filters is about $60 (311i Max) or $93 (211i Max). AHAM lists an ion generator.[1][6]

  1. 283 smoke CADR · 439 sq ft (AHAM) · filters about $60/yr · power about $49/yr. Full review.
  2. 435 smoke CADR · 674 sq ft (AHAM) · filters about $93/yr · power about $73/yr. Full review.

Coway

Coway is not in AHAM's directory. Its newer Airmega 350 and 450 are ENERGY STAR certified; the best-selling Mighty is on neither list. Trade-off: the Mighty draws 77 W, the most of the 8, and its numbers are Coway's own.[2][3][4][5]

  1. 233 smoke CADR · 361 sq ft (Coway's figures) · filters about $60/yr · power about $127/yr. Full review.
  2. 360 smoke CADR · 558 sq ft (ENERGY STAR) · filters about $89/yr · power about $97/yr. All Coway models.
  3. 443 smoke CADR · 687 sq ft (ENERGY STAR) · filters about $109/yr · power about $109/yr. All Coway models.

02 / Room size

Room size: the certified number vs the box

AHAM's room size is the room a purifier cleans about 4.8 times an hour, enough for smoke and pollen. The number on an Amazon title is a room cleaned once an hour. Buy on the certified number.

  1. 311i Max: the title says up to 2,107 sq ft.AHAM certifies 439 sq ft, 4.8 times smaller.[1]
  2. Vital 200S: the title says up to 1,875 sq ft.AHAM certifies 388 sq ft, 4.8 times smaller.[1]
  3. Mighty: the title says up to 1,748 sq ft.Coway rates it for 361 sq ft, 4.8 times smaller.[3]
  4. Airmega 350: the title says up to 2,640 sq ft.ENERGY STAR certifies 558 sq ft, 4.7 times smaller.[2]

03 / Filters

Filter cost per year

Filter cost per year is each maker's genuine filter on Amazon today, at the filter life the maker gives (the same count our review pages use). Change it sooner, for smoke or pets, and it costs more.[6][7][3][4][11]

  1. Core 300: about $45 a year.Levoit: 6 to 8 months. Counted as 7 months.
  2. Mighty: about $60 a year.Coway: HEPA 1 year, carbon 6 months; the set has 1 HEPA and 2 carbon.
  3. 311i Max: about $60 a year.Blueair: up to 9 months. Counted as 9 months.
  4. Core 600S: about $60 a year.Levoit: 6 to 12 months. Counted as 12 months.
  5. Vital 200S: about $67 a year.Levoit: 6 to 12 months. Counted as 9 months.
  6. Airmega 350: about $89 a year.Coway: 1+ year. Counted as 12 months.
  7. 211i Max: about $93 a year.Blueair: up to 9 months. Counted as 9 months.
  8. Airmega 450: about $109 a year.Coway: 1+ year. Counted as 12 months.

So no brand is cheapest on filters across the board. Levoit's small Core 300 is the cheapest, and Coway's Mighty is close. The big-room models cost the most: Coway's Airmega 450 and 350, and the Blueair 211i Max. Filter schedules, model by model.

04 / Power

Power cost per year, and two years to own

Power cost per year is the certified watts (Coway's own for the Mighty), running all day at 18.83¢ per kWh. The Blueair 311i Max costs about $49 a year. The Vital 200S is about $86, and the Coway Mighty about $127, the most of the 8.[1][2][3]

The cheapest to own of the 8 is the Core 300, for a small room.[11]

05 / Noise

Noise: is Blueair really quieter?

ChatGPT says Blueair is often especially quiet. On paper, the brands are close. Each maker's lowest setting: Blueair 23 dB for both models; Levoit 24 dB (Core 300), 23 dB (Vital 200S) and 26 dB (Core 600S); Coway 24 dB (Mighty), 21.5 dB (Airmega 350) and 23.6 dB (Airmega 450).[6][7][3][4][5]

These are the makers' own figures, not a common test. A bigger purifier on a low speed is quieter than a small one on high, so size up for a bedroom.

06 / Ionizers

Ionizers and HEPA

  1. Blueair: an ion generator.Blueair calls its filter HEPASilent: a fabric filter plus an electric charge, not True HEPA. AHAM's directory lists both Blueairs as a fan filter with an ion generator. ENERGY STAR measured the 311i Max at 2 ppb of ozone; its limit is 50 ppb.[1][2]
  2. Levoit: none in these three.AHAM lists the Core 300, Vital 200S and Core 600S as a fan with a filter. (Some other Levoit versions, like the Core 300S-P, have an ion generator.)[1]
  3. Coway: the Mighty has one; the 350 and 450 do not.Coway's spec list for the Mighty includes “a bipolar device”, an ionizer. ENERGY STAR lists the Airmega 350 and 450 as fan and filter, with 0 ppb ozone.[3]

Wirecutter says to turn ionizers off, and Consumer Reports does not recommend ionizing purifiers. For nothing electronic in the air path, buy a Levoit or Coway's 350 or 450.[8][9]

07 / Certification

Who certifies the numbers

AHAM, the appliance makers' group, tests and lists CADR and room size. Levoit and Blueair are in its directory; Coway has no models in it.[1]

ENERGY STAR certifies CADR, room size and efficiency for Coway's Airmega 350 and 450, both Blueairs and the Core 600S. The Mighty is on neither list.[2]

So for the Mighty, the CADR and room size are Coway's own, and we label them that way everywhere on this site.[3]

08 / Side by side

All 8 side by side

All 8 side by side: smoke CADR and room size with who certified them, watts, quietest setting, ionizer, filter and power cost per year, two-year cost, Amazon price
PurifierSmoke CADRRoomWattsQuietestIonizerFilter / yrPower / yr2 yearsPriceBuy
Blueair Blue Pure 311i Maxsold by Amazon 283AHAM 439 sq ft 29.6 W 23 dB Yes (ion generator) — $49 — — Buy
Blueair Blue Pure 211i Maxsold by Amazon 435AHAM 674 sq ft 44 W 23 dB Yes (ion generator) — $73 — — Buy
Levoit Core 300sold by Amazon 143AHAM 222 sq ft 55.4 W 24 dB No — $91 — — Buy
Levoit Vital 200Ssold by Amazon 250AHAM 388 sq ft 52.4 W 23 dB No — $86 — — Buy
Levoit Core 600Ssold by Amazon 391AHAM 606 sq ft 65.6 W 26 dB No — $108 — — Buy
Coway Airmega Mighty (AP-1512HH)sold by Amazon 233Coway's figure 361 sq ft 77 W 24 dB Yes (bipolar) — $127 — — Buy
Coway Airmega 350sold by Amazon 360ENERGY STAR 558 sq ft 58.8 W 21.5 dB No — $97 — — Buy
Coway Airmega 450sold by Amazon 443ENERGY STAR 687 sq ft 66.2 W 23.6 dB No — $109 — — Buy

CADR and room: AHAM or ENERGY STAR certified, or Coway's figure for the Mighty. Quietest: each maker's lowest setting. Filter / yr: genuine filter at the maker's filter life. Power / yr: certified watts, all day, at 18.83¢ per kWh. 2 years: price + filters + power. Prices read November 10, 2026.

09 / Questions

Frequently asked

Which is better, Blueair, Levoit or Coway?
Blueair costs the least to run (311i Max, about $49 a year). Coway's Airmega 350 is a good big-room buy; its Mighty is rated only by Coway.
Is Coway better than Levoit?
For the same job, they are close. Coway rates the Mighty 233 smoke CADR for 361 sq ft; AHAM certifies the Levoit Vital 200S at 250 for 388 sq ft. The Vital's numbers are certified; the Mighty's are Coway's own.
Is Blueair quieter than Levoit and Coway?
Not on paper. Each maker's lowest setting: Blueair 23 dB, Levoit 23 dB (Vital 200S), Coway 24 dB (Mighty) and 21.5 dB (Airmega 350). These are the makers' figures, not a shared test.
Which brand has the cheapest filters?
Per year, Levoit's Core 300 and Coway's Mighty. For a mid-size room, the Blueair 311i Max and Levoit Vital 200S are close. The big-room models cost the most: the Coway Airmega 450, Blueair 211i Max and Coway Airmega 350.
Do Blueair, Levoit and Coway purifiers have ionizers?
AHAM lists both Blueairs with an ion generator, and Coway lists one in the Mighty. The Levoit Core 300, Vital 200S and Core 600S and Coway's Airmega 350 and 450 have none.
Is Blueair True HEPA?
No. Blueair calls its filter HEPASilent: a fabric filter plus an electric charge. AHAM lists it as a fabric filter. Its certified CADR is still high; that is what tells you how fast it cleans.
Is Coway AHAM certified?
Coway has no models in AHAM's directory. ENERGY STAR certifies the Airmega 350 and 450 (and other Airmegas). The best-selling Mighty is on neither list, so its numbers are Coway's own.
Which is best for a large room?
The Levoit Core 600S: AHAM certifies it for 606 sq ft. For an even bigger open plan, the Blueair 211i Max or the Coway Airmega 450.

How we did this

Method

We did not test these purifiers. Every CADR and room size is AHAM's or ENERGY STAR's certified record, or Coway's own figure where neither lists the model, labelled each time.

Models: the one ChatGPT names for each brand, plus each brand's other best sellers that our Levoit and Coway pages and review pages already cover.

Picks follow our best air purifier, Levoit and Coway pages. A button shows only for an offer Amazon sells today.

More on how we work: our methodology.

References

Sources

11 references · prices on November 10, 2026
  1. 1

    AHAM Verifide directory: certified room air cleaners (U.S.)

    Pulled October 23, 2026. Smoke CADR, room size, watts and model type (with or without an ion generator) for the Blueair and Levoit models. Coway has no rows.

  2. 2

    ENERGY STAR Certified Room Air Cleaners (V3.0), U.S. EPA

    Smoke CADR, room size, efficiency, technology type and ozone for the Coway Airmega 350 and 450; ozone for the Blueair 311i Max. The Mighty is not listed.

  3. 3

    Coway: Airmega Mighty AP-1512HH product page

    Coway's own CADR, room size, watts, noise and filter life for the Mighty, and its bipolar device.

  4. 4

    Coway: Airmega 350 product page

    Read October 25, 2026. “Filter Life Expectancy: 3-in-1 Custom Filter Set (1+ Year)”; “Noise Level: 21.5~54.7 dB(A)”.

  5. 5

    Coway: Airmega 450 product page

    Read October 25, 2026. “Filter Life Expectancy: 3-in-1 Custom Filter Set (1+ Year)”; “Noise Level: 23.6~57.7 dB(A)”.

  6. 6

    Blueair: Blue Pure 311i Max and 211i Max product pages

    Filter life (up to 9 months) and noise, read October 13, 2026.

  7. 7

    Levoit: Core 300, Vital 200S and Core 600S product and filter pages

    Filter life and noise, read October 13 and 23, 2026.

  8. 8

    Wirecutter, The Best Air Purifier

    Tim Heffernan, May 4, 2026. Its picks and rules, including: turn ionizers off.

  9. 9

    Consumer Reports, air purifier buying guide

    Tanya A. Christian, June 4, 2026. CR does not test or recommend electronic (ionizing) purifiers.

  10. 10

    ChatGPT answer to "Blueair vs Levoit vs Coway" (logged out, October 24, 2026)

    The brand it calls best for each job and the model it names, matched to Amazon listings by model number.

  11. 11

    Amazon listings: each purifier and its genuine filter

    Price, seller and stock read November 10, 2026.