Blueair 311i Max vs Coway Mighty vs Levoit Vital 200S-P vs Winix 5510 for a medium room

The four purifiers side by side

The Blueair is rated at 32 W, and it’s the only one of the four whose CADR shows up in an Energy Star listing^{1, 7}. The catch is filters at about $60 to $90 a year^{1, 2}. The Levoit’s $49.99 filter can last a year, but Levoit publishes only one CADR figure^{15, 17, 18}.

The Winix 5510 matches the Levoit’s price only while its sale lasts^{25, 27}. The Coway’s CADR figures are the lowest of the four⁹. All the figures below are the makers’ own.

Prices are US prices on each maker’s store, before tax, checked on October 13, 2026. The Winix prices are sale prices, marked below. The three-year cost adds three years of filters to the purchase price. It leaves out electricity, because no maker says which speed its power figure applies to. Where a cell says a figure isn’t published, it wasn’t on the maker’s pages.

Which one should you buy?

All four suit a single room of 360 to 440 ft². The choice comes down to how much air you want moved, what you’ll pay each year and how you like to control it. These are picks for different needs, not a ranking.

• The most clean air for a room up to 439 ft²: Blueair Blue Pure 311i Max. Blueair rates it at 283 cfm for smoke, and Energy Star lists the same figures^{1, 7}. It has the lowest power rating of the four, 32 W, and runs from 23 dB on low¹. At 7.8 lb with air drawn in from all sides, it’s the easiest to move and place¹. The catch: filters cost $59.99 to $89.98 a year, and the three-year warranty depends on registering within 60 days^{1, 2, 5}.
• The lowest cost with app control: Levoit Vital 200S-P. It’s $199.99, and the manual says to change its $49.99 filter every 12 months^16–18. That’s $349.96 over three years before electricity. The 2-year warranty needs no registration, and the manual mentions no ionizer^{17, 19}. The catch: Levoit gives one 250 CFM figure without naming the pollutant¹⁵. Its filter page also says the filter may last only 6 months, which doubles the yearly cost¹⁸.
• Separate smoke, dust and pollen ratings near $200: Winix 5510. Winix rates it at 253 cfm for smoke, for a 392 ft² room²⁵. One $49.99 Filter Q set covers a year²⁷. The catch: both prices are sales. At the regular $259.99 and $79.99, three years comes to $499.96^{25, 27}. PlasmaWave is built in, though it switches off^{25, 26}.
• Plain buttons, no app and a cheap yearly filter set: Coway Airmega Mighty. One $59.79 set covers a year of HEPA and carbon filters^{11, 12}. The motor and electronics are covered for 3 years, and the ionizer has its own off button^{10, 13}. The catch: its CADR figures, 233 to 246, are the lowest here, and so is its 361 ft² room rating⁹. It costs the most today, at $239.99⁹. Its 77 W power rating is also the highest of the four⁹.

What the room ratings mean

All four makers size rooms at 4.8 air changes an hour, which means a room’s worth of air goes through the filter every 12.5 minutes^{1, 9, 15, 25}. That makes their room figures comparable. The Blueair is rated for 439 ft², the Winix for 392, the Levoit for 388 and the Coway for 361. The Blueair’s 283 cfm smoke CADR is about 21% more than the Coway’s 233^{1, 9}. Levoit’s 250 CFM can’t be placed exactly, because Levoit doesn’t say which pollutant it refers to¹⁵.

The bigger numbers on each page assume far fewer air changes. Coway’s 874 and 1,748 ft² are the same airflow at 2 and 1 air changes an hour^{9, 10}. Levoit’s 1,862 ft² is one air change an hour¹⁵. Winix’s 941 and 1,882 ft² are 2 and 1²⁵. Blueair’s 1,054 and 2,107 ft² mean one change every 30 or 60 minutes¹. Use the 4.8 figure when you size a bedroom or living room.

Blueair’s page isn’t consistent on room size. It also shows 387 and 465 ft² in places, and says box ratings may differ during a DOE rating update¹. The 439 ft² figure is the one Energy Star lists⁷.

Filter and electricity costs

Over three years, purchase plus filters comes to $349.96 for the Levoit on the manual’s 12-month schedule^16–18. The Winix is also $349.96 at today’s sale prices, or $499.96 at regular prices^{25, 27}. The Coway is $419.36 with one $59.79 set a year^{9, 11}. The Blueair is $409.96 if a filter lasts 9 months, or $499.93 at 6^{1, 2}.

Blueair, Coway and Levoit also sell smoke, allergy or pet filters for the same housing. Blueair’s SmokeBlock costs $59.99 and its AllergenBlock $64.99^{3, 4}. Coway’s Allergen, Intense Smoke and Pet sets cost $64.99^{11, 12}. Levoit sells Pet Allergy, Toxin Absorber and Smoke Remover filters for $59.99 to $64.99^22–24. Two of those Levoit listings don’t make clear whether you get one filter or two^{22, 24}.

Each maker gives one power figure and doesn’t say which speed it applies to^{1, 9, 15, 26}. The Blueair is rated at 32 W and the Levoit at 50 W. The Winix is rated at 65 W, and the Coway at 77 W. Energy Star lists the Blueair at 193 kWh a year but doesn’t say how many hours a day that assumes⁷. Electricity costs for the other three are unknown.

Ratings you can check, and ionizers

Only the Blueair’s CADR could be confirmed outside the maker’s own pages. Energy Star lists it at 283, 314 and 365 cfm with a 439 ft² room⁷. Winix says the 5510 is AHAM Verifide, and Levoit’s filter page makes the same claim^{18, 25}. AHAM’s directory couldn’t be read to check either one³³. Neither the Levoit nor the Winix 5510 is in Energy Star’s certified data^{21, 32}. Coway’s page shows no AHAM mark⁹.

None of the four turned up in the part of CARB’s certified list that could be read^{8, 31}. The list cut off partway, so their status is unconfirmed rather than missing. Coway’s newer MightyC and Mighty2 are on it⁸. So is Winix’s 5530, which takes the same Filter Q as the 5510^{27, 31}.

The Coway has an ionizer, and the Winix has PlasmaWave^{10, 25}. Each has its own off button^{10, 26}. Both manuals say the units meet a 0.050 ppm ozone limit over 24 hours^{10, 26}. Winix also gives an 8-hour average of 0.22 ppbv in a test chamber, without naming the lab²⁵. Levoit’s manual mentions no ionizer¹⁷. Blueair doesn’t say whether its electrostatic stage ionizes, but Energy Star lists the 311i Max as fan and filter, with 2 ppb of ozone^{1, 7}.

Placement, warranty and returns

The Blueair is the lightest at 7.8 lb and draws air in from all sides, though Blueair gives no wall clearance¹. The other three weigh 12.3 to 13.3 lb^{9, 17, 25}. Coway asks for 20 cm (about 8 in) from walls, and Winix for 12 to 18 in^{10, 26}. Levoit wants 15 in of open space in front¹⁷. So the Coway, Levoit and Winix need more floor space than their footprints suggest.

Levoit gives 2 years with no registration¹⁹. Winix also gives 2 years, but not for units bought from independent marketplace sellers, and a non-Winix filter voids it²⁸. Coway covers the motor and electronics for 3 years and other parts for 1, and excludes office use^{10, 13}. Blueair gives 1 year, or 3 if you register within 60 days and change filters on its schedule⁵.

All four take returns for 30 days on direct orders. Blueair and Levoit send a prepaid label^{6, 20}. Coway and Winix have you pay return shipping, though Coway’s product page says “30 days free return”^{9, 14, 28}.

If you own a working Winix 5500-2, there’s no need to replace it. Winix lists it as discontinued, and its store no longer sells it^{28, 29}. Its Filter H set is still sold, at $54.99 on sale³⁰.

Sources

1. Blue Pure 311i Max Blueair · manufacturer
2. Blue Pure 311i Max Particle + Carbon Filter Blueair · manufacturer
3. Blue Pure 311i Max SmokeBlock Filter Blueair · manufacturer
4. Blue Pure 311i Max AllergenBlock Filter Blueair · manufacturer
5. Blueair limited warranty (US) Blueair · manufacturer
6. Return policy (US) Blueair · manufacturer
7. ENERGY STAR Certified Room Air Cleaners: Blueair 3332111100 US EPA ENERGY STAR · certifier · data file
8. List of CARB-Certified Air Cleaning Devices California Air Resources Board · regulator
9. Airmega Mighty AP-1512HH Coway · manufacturer
10. Airmega Mighty AP-1512HH user manual (US) Coway · manufacturer
11. Airmega Mighty AP-1512HH & 200M Filter Set Coway · manufacturer
12. Airmega Mighty AP-1512HH & 200M Filter Set store listing (options and prices) Coway · manufacturer · data file
13. Is my unit still covered under the warranty? Coway · manufacturer
14. Refund policy Coway · manufacturer
15. Levoit Vital 200S-P Smart Air Purifier Levoit · manufacturer
16. Levoit Vital 200S-P Smart Air Purifier - Black Levoit · manufacturer
17. Vital 200S-P Smart Air Purifier user manual (LAP-V201S-WUS, LAP-V201S-KUS) Levoit · manufacturer
18. Vital 200S Replacement Filter Levoit · manufacturer
19. Warranty policy Levoit · manufacturer
20. Return policy Levoit · manufacturer
21. ENERGY STAR Certified Room Air Cleaners V3.0 data (searched for Levoit, Vital and V201S) US EPA ENERGY STAR · certifier · data file
22. Levoit Vital 200S-P Pet Allergy Carbon Replacement Filter Levoit · manufacturer
23. Levoit Vital 200S-P Toxin Absorber Carbon Replacement Filter Levoit · manufacturer
24. Levoit Vital 200S-P Smoke Remover Carbon Replacement Filter Levoit · manufacturer
25. Winix 5510 - Air Purifier with WiFi & PlasmaWave® Technology Winix · manufacturer
26. 5510 and 5520 user manual Winix · manufacturer
27. Winix Filter Q Replacement Filter | 5510, 5520 & 5530 Winix · manufacturer
28. Terms and Conditions (product warranty and return policy) Winix · manufacturer
29. Air Purifiers - Winix America Inc Winix · manufacturer
30. Winix 116130 - Winix Replacement Filter H - For Winix 5500-2 & AM80 Air Purifier Winix · manufacturer
31. List of CARB-Certified Air Cleaning Devices California Air Resources Board · regulator
32. ENERGY STAR certified room air cleaners data (search: Winix) US EPA ENERGY STAR · certifier · data file
33. AHAM Verifide directory of room air cleaners Association of Home Appliance Manufacturers · certifier