Blueair Classic Pro CP7i vs Coway Airmega 400S
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: A two-filter, 393 CFM unit
Check price at AmazonBest for: Coway's large-room classic with app control
Check price at AmazonSpec-by-spec comparison
Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.
| Spec | Blueair Classic Pro CP7i | Coway Airmega 400S | 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. | 393 CFM | 328 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. | 6.8 CFM/W | 5 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. | 24 dB | 22 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. | 55 dB | 52 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 | Yes | 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 | 12 months | 15% |
| CADR (smoke / dust / pollen) | 393 / 387 / 441 | 328 / 328 / 400 | info |
| Recommended room | 609 ft² (4.8 ACH) | Not listed | info |
| Filters | 2 × particle + carbon | Not listed | info |
| Filter life | Up to 1 year (RealTrack) | Max2: 1 year | info |
| Noise | 24–55 dB | 22–52 dB(A) | info |
| Power | 2.6–58 W | 66 W | info |
| Weight | 32 lb | 24.7 lb | info |
| Coverage | Not listed | 3,120 ft² at 1 air change/hr; 1,560 ft² at 2 | info |
| Filter | Not listed | Washable pre-filter + Max2 set (activated carbon + HEPA) | info |
| App | Not listed | IoCare+ app, scheduler | info |
| AirPick score | 5.7/10 | 4.8/10 | 100% |
Where each one comes out ahead
Blueair Classic Pro CP7i
Better published figure on: Smoke CADR, CADR per watt.
What we like
- 393 CFM
- Two filters
Watch out for
- 32 lb
Coway Airmega 400S
Better published figure on: Quietest setting, Loudest setting.
What we like
- 328 CFM smoke CADR
- App with scheduling
Watch out for
- 24.7 lb
Verdict
CP7i has more airflow (393 vs 328 CFM). The 400S is lighter at 24.7 vs 32 lb, and both rate their filters at a year.
- Blueair Classic Pro CP7i: Blueair: Classic Pro CP7i
- Coway Airmega 400S: Coway: Airmega 400S