Coway Airmega Halo vs Blueair Blue Pure 411i Max
Two of the bedroom & small-room air purifiers in our best bedroom & small-room air purifiers: quietest levoit, coway, blueair & winix 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: 17.8 dB in sleep mode, Energy Star
Check price at AmazonBest for: 19 dB on low, 46 dB on high
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 Halo | Blueair Blue Pure 411i Max | Weight |
|---|---|---|---|
| Quietest settingThe lowest listed noise level, usually sleep mode. Under about 25 dB is near-silent in a bedroom. Shark and Honeywell don't list noise, so they score at the lowest published value in the category. | 17.8 dB | 19 dB | 30% |
| Smoke CADRSmoke CADR when listed (Levoit lists one headline CADR). About 100 CFM suits a 150 sq ft bedroom, and 160 CFM suits 240 sq ft. | 253.3 CFM | 167 CFM | 25% |
| Loudest settingTop-speed noise, for when you boost it after cooking or during pollen season. Left out when the maker lists only the minimum. | 52.13 dB | 46 dB | 15% |
| CADR per wattComputed by us: smoke CADR divided by rated power. A bedroom unit often runs all night, every night. | 6.7 CFM/W | 8.3 CFM/W | 10% |
| Carbon or odor stage includedYes when the included filter has an activated-carbon or deodorization layer, per the maker's page. | Yes | Yes | 10% |
| Main filter lifeThe maker's 'up to' life for the main filter. Usage assumptions vary by brand. | 12 months | 12 months | 10% |
| CADR (smoke / dust / pollen) | 253.3 / 259 / 294.4 | 167 / 174 / 189 | info |
| Coverage | 1,898 ft² at 1 air change/hr | Not listed | info |
| Filter | 3-in-1: pre-filter + HEPA + deodorization carbon | Particle + carbon | info |
| Filter life | 1 year | Up to 1 year (RealTrack) | info |
| Noise | 17.8–52.13 dB | 19 dB low, 46 dB high | info |
| Power | 38 W (Energy Star 3.0) | 20 W | info |
| Weight | 9.7 lb | 8.38 lb | info |
| Recommended room | Not listed | 259 ft² (4.8 ACH) | info |
| AirPick score | 7.6/10 | 7.2/10 | 100% |
Where each one comes out ahead
Coway Airmega Halo
Better published figure on: Quietest setting, Smoke CADR.
What we like
- Quietest low setting here (17.8 dB)
- 253 CFM, enough for a big bedroom
Watch out for
- 52 dB on high
Blueair Blue Pure 411i Max
Better published figure on: Loudest setting, CADR per watt.
What we like
- Quietest top speed in this group (46 dB)
- 8.4 CFM per watt
Watch out for
- 259 ft² recommended room
Verdict
On published specs, the Coway Airmega Halo scores higher (7.6 vs 7.2). Specs don't capture sound character or feel, so weigh the pros and cons above too.
- Choose the Coway Airmega Halo if this sounds like you: 17.8 dB in sleep mode, Energy Star.
- Choose the Blueair Blue Pure 411i Max if this sounds like you: 19 dB on low, 46 dB on high.
- Coway Airmega Halo: Coway: Airmega Halo
- Blueair Blue Pure 411i Max: Blueair: Blue Pure 411i Max