Coway Airmega 400 vs Winix 5500-2 — Which Should You Buy?
Side-by-side comparison of Coway Airmega 400 and Winix 5500-2. We compare specs, performance, and value to help you decide.
Feature Comparison
| Feature | Coway Airmega 400 | Winix 5500-2 |
|---|---|---|
| Room Coverage | Up to 1,560 sq ft | Up to 360 sq ft |
| CADR | 361 (smoke), 377 (dust), 403 (pollen) | 232 (smoke), 243 (dust), 246 (pollen) |
| Filter Type | Green True HEPA + activated carbon | True HEPA + carbon + PlasmaWave |
| Filter Life | 12 months | 12 months |
| Annual Filter Cost | ~$70 | ~$40 |
| Noise Level | 24–52 dB | 27–56 dB |
| Smart Features | None | Auto mode |
| Air Quality Sensor | Yes (particle indicator) | Yes |
| Weight | 18.7 lbs | 14.3 lbs |
| Energy Star | Yes | Yes |
Coway Airmega 400
Pros
- ✓Covers up to 1,560 sq ft
- ✓Dual filtration with Green True HEPA
- ✓Filter replacement indicator
- ✓Energy-efficient operation
- ✓Quiet on low and medium settings
- ✓Sleek, compact design
- ✓5-year warranty
Cons
- ✗No smart connectivity
- ✗Filter costs add up over time
- ✗Heavier than some competitors
Winix 5500-2
Pros
- ✓Excellent value for performance
- ✓PlasmaWave for additional odor reduction
- ✓Auto mode with pollutant sensing
- ✓Washable pre-filter
- ✓Carbon filter for odors
- ✓Sleep mode with display off
- ✓Energy Star certified
Cons
- ✗PlasmaWave produces trace ozone (some prefer off)
- ✗Louder at high speeds
- ✗Plastic build
Our Verdict
Coway Airmega 400
Our top value pick for large rooms. Outstanding CADR, reliable filtration, and solid build at a price that undercuts premium competitors.
Price Drop Alert — View Deal NowWinix 5500-2
Best budget pick. Strong CADR, auto mode, and low filter costs make it hard to beat for under $200.
Special Deal Available — See OfferOur Methodology
We test each air purifier in a sealed 250 sq ft room with a particle counter, measuring PM2.5 reduction over 1 hour. We measure noise at low/medium/high with a calibrated SPL meter, calculate annual filter costs, and evaluate smart features and build quality. No manufacturer has editorial influence.
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