Coway vs Blueair: Which Air Purifier Is Better?
Our editorial team compared specifications, buyer feedback and key decision factors to help you choose between Coway and Blueair air purifiers. We contrast top models like the Coway Airmega 400 and Blueair Blue Pure 211+ across CADR, filter technology, energy efficiency, noise, design, and price. Read on to see which brand wins for your needs.
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Coway Airmega 400
Best overall for large rooms with high CADR and low energy use.
Check priceCoway Airmega 400 wins for higher CADR, better energy efficiency, and lower long-term filter costs. Blueair Blue Pure 211+ is a strong alternative if you prioritize design and whisper-quiet operation at a lower upfront price.
Spec by spec
Highlighted cell wins that row.
| Coway Airmega 400 | Blueair Blue Pure 211+ | |
|---|---|---|
| CADR (Smoke/Dust/Pollen) | 350 / 350 / 350 cfm | 350 / 350 / 350 cfm |
| Room Size (sq ft) | 1,560 sq ft (4x/hr) | 1,500 sq ft (4x/hr) |
| Filter Type | True HEPA + carbon pre-filter | HEPASilent (electrostatic + mechanical) |
| Energy Star Certified | Yes | Yes |
| Noise Level (low/high) | 22 - 52 dB | 17 - 56 dB |
| Annual Filter Cost | $50 - $60 | $80 - $100 |
| Warranty | 3 years | 2 years |
Who should buy which
- + Large room owners (up to 1,560 sq ft)
- + Budget-conscious buyers (lower filter costs)
- + Those wanting maximum CADR and energy efficiency
- + Design lovers (modern, colorful options)
- + Light sleepers (ultra-quiet at low speed)
- + Smaller spaces or lower upfront budget
Quick questions
Which brand is better for allergies?
Both are excellent. Coway's True HEPA captures 99.97% of particles, while Blueair's HEPASilent technology also removes 99.97% of airborne allergens. Coway may have a slight edge with its pre-filter that captures larger particles first, extending filter life.
Do Coway and Blueair produce ozone?
Neither brand produces harmful ozone. Coway uses mechanical filtration (no ozone). Blueair's HEPASilent technology uses a small electrostatic charge but is CARB certified and emits less than 0.5 ppb ozone, well below safety limits.
Which is quieter: Coway or Blueair?
Blueair is generally quieter on low speed (17 dB vs 22 dB). On high speed, Coway is slightly quieter (52 dB vs 56 dB). For bedroom use, Blueair's low-speed whisper is a plus.