Coway Airmega 400S vs Levoit EverestAir
Two of the large-room air purifiers in our best large-room air purifiers: coway, blueair, levoit, winix, iqair & more comparison, lined up spec by spec. Every figure comes from the manufacturer pages linked below, and the scores use the same published formula as the full ranking.
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Best for: Coway's large-room classic with app control
Check price at AmazonBest for: Levoit's 354 CFM purifier with adjustable vents
Check price at AmazonSpec-by-spec comparison
Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.
| Spec | Coway Airmega 400S | Levoit EverestAir | Weight |
|---|---|---|---|
| Smoke CADRSmoke is the hardest of the three AHAM CADR tests, so we use it when listed. Levoit lists one headline CADR, and we use that. Shark, Honeywell, Molekule and IQAir don't publish an AHAM CADR, so those cells are blank and score at the lowest published value in the category. | 328 CFM | 354 CFM | 40% |
| CADR per wattComputed by us: smoke CADR divided by the maker's rated or maximum power. Higher means more clean air for the electricity, which matters for a machine that runs all day. | 5 CFM/W | 5.1 CFM/W | 15% |
| Quietest settingThe lowest listed noise level, usually sleep mode. Makers measure at different distances, so treat differences of 1–2 dB as a tie. | 22 dB | 24 dB | 10% |
| Loudest settingNoise at top speed, which is what you hear when you run it hard for smoke or cooking. Left blank when the maker lists only the minimum. | 52 dB | 56 dB | 10% |
| Carbon or odor stage includedYes when the filter in the box includes an activated-carbon or deodorization stage, per the maker. HEPA alone traps particles but not odors or gases. | Yes | No | 10% |
| Main filter lifeThe maker's 'up to' figure for the main HEPA filter. Makers assume different daily run times (noted on each product), so this is a rough guide to running costs. | 12 months | Not listed | 15% |
| CADR (smoke / dust / pollen) | 328 / 328 / 400 | Not listed | info |
| Coverage | 3,120 ft² at 1 air change/hr; 1,560 ft² at 2 | Not listed | info |
| Filter | Washable pre-filter + Max2 set (activated carbon + HEPA) | 3-stage Original filter | info |
| Filter life | Max2: 1 year | Not listed | info |
| Noise | 22–52 dB(A) | 24–56 dB | info |
| Power | 66 W | Not listed | info |
| App | IoCare+ app, scheduler | Not listed | info |
| Weight | 24.7 lb | Not listed | info |
| CADR | Not listed | 354 CFM | info |
| Ideal room size | Not listed | 549 ft² (4.8 ACH) / 2,635 ft² (1 ACH) | info |
| Rated power | Not listed | 70 W | info |
| Sensor | Not listed | Three-channel laser (PM1.0, PM2.5, PM10) | info |
| Model | Not listed | LAP-EL551S-AUS | info |
| AirPick score | 4.8/10 | 3.8/10 | 100% |
Where each one comes out ahead
Coway Airmega 400S
Better published figure on: Quietest setting, Loudest setting, Carbon or odor stage included.
What we like
- 328 CFM smoke CADR
- App with scheduling
Watch out for
- 24.7 lb
Levoit EverestAir
Better published figure on: Smoke CADR, CADR per watt.
What we like
- 354 CFM
- PM1/PM2.5/PM10 readings
Watch out for
- Carbon stage not named on the page
- 70 W
Verdict
EverestAir lists 354 CFM to the 400S's 328 and has a PM1/PM10 laser sensor. The 400S has a named carbon + HEPA filter and is 4 dB quieter at the top.
- Coway Airmega 400S: Coway: Airmega 400S
- Levoit EverestAir: Levoit: EverestAir-P