Coway Airmega vs Blueair: Which Air Purifier Is Better?
We compare Coway Airmega and Blueair air purifiers head-to-head on CADR, filter costs, noise, smart features, and overall value to help you choose the best model for your needs.
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Coway Airmega
Best overall value with high CADR, low filter costs, and excellent smart features.
Check priceBlueair
Ultra-quiet and stylish, but higher filter costs and fewer smart features.
Check priceCoway Airmega wins overall for its higher CADR, lower long-term filter costs, and robust smart features. Blueair is a strong choice if you prioritize whisper-quiet operation and minimalist design.
Spec by spec
Highlighted cell wins that row.
| Coway Airmega | Blueair | |
|---|---|---|
| CADR (Smoke/Dust/Pollen) | 400/400/400 cfm (Airmega 400S) | 350/350/350 cfm (Blue Pure 211+) |
| Room Size Coverage | Up to 1,560 sq ft (4x/hr) | Up to 1,400 sq ft (4x/hr) |
| Annual Filter Cost | $60 - $80 per year | $100 - $140 per year |
| Noise Level (Low/High) | 22 dB / 52 dB | 17 dB / 52 dB |
| Smart Features | Wi-Fi, app, auto mode, air quality display | Basic: no Wi-Fi, manual controls only (on most models) |
| Filter Type | True HEPA + activated carbon (washable pre-filter) | HEPASilent (electrostatic + mechanical) + carbon |
| Energy Star Certified | Yes | Yes |
Who should buy which
- + You want the highest CADR for large rooms or open floor plans.
- + You care about long-term cost and prefer lower filter replacement expenses.
- + You want smart features like app control, auto mode, and real-time air quality feedback.
- + You need a washable pre-filter to reduce maintenance.
- + You prioritize ultra-quiet operation, especially at low speeds for bedrooms.
- + You love minimalist Scandinavian design and want a purifier that blends in.
- + You are willing to pay more for filters in exchange for lower energy use and silent performance.
- + You don't need smart connectivity and prefer simple manual controls.
Quick questions
Which brand has lower filter replacement costs?
Coway Airmega generally has lower annual filter costs (around $60-$80) compared to Blueair ($100-$140). Coway's washable pre-filter also extends the life of the main filter, saving you money over time.
Is Blueair quieter than Coway Airmega?
Yes, Blueair models are typically quieter at low speeds (as low as 17 dB) compared to Coway's 22 dB. Both are similar at high speeds (around 52 dB). Blueair's HEPASilent technology allows for quieter operation, making it ideal for bedrooms.
Do Coway and Blueair air purifiers have smart features?
Coway Airmega models like the 400S offer Wi-Fi, app control, auto mode, and real-time air quality display. Most Blueair models lack smart features, though some newer models (e.g., Blueair 411 Auto) have basic auto mode but no app. For full smart home integration, Coway is the better choice.
How often do I need to replace filters on each brand?
Coway Airmega filters typically last 12 months, with the pre-filter needing washing every 2-4 weeks. Blueair filters also last about 12 months, but the pre-filter is not washable on most models, so you may need to replace it more frequently. Following the manufacturer's recommended schedule ensures optimal performance.
Which brand is better for allergies?
Both are excellent for allergies. Coway Airmega's True HEPA filter captures 99.97% of particles as small as 0.3 microns, including pollen, dust mites, and pet dander. Blueair's HEPASilent technology also captures 99.97% of particles, but its electrostatic charge may help trap smaller particles. For severe allergies, Coway's higher CADR may clear the air faster.