Dyson Purifier Big+Quiet Formaldehyde vs Winix 5500-2 — Which Should You Buy?
Side-by-side comparison of Dyson Purifier Big+Quiet Formaldehyde and Winix 5500-2. We compare specs, performance, and value to help you decide.
Feature Comparison
| Feature | Dyson Purifier Big+Quiet Formaldehyde | Winix 5500-2 |
|---|---|---|
| Room Coverage | Up to 1,000 sq ft | Up to 360 sq ft |
| CADR | Not disclosed (whole-room) | 232 (smoke), 243 (dust), 246 (pollen) |
| Filter Type | HEPA H13 + catalytic formaldehyde | True HEPA + carbon + PlasmaWave |
| Filter Life | 12 months | 12 months |
| Annual Filter Cost | ~$80 | ~$40 |
| Noise Level | 24–52 dB | 27–56 dB |
| Smart Features | App, auto mode, pollutant sensing | Auto mode |
| Air Quality Sensor | Yes | Yes |
| Weight | 14.3 lbs | 14.3 lbs |
| Energy Star | Yes | Yes |
Dyson Purifier Big+Quiet Formaldehyde
Pros
- ✓Sealed HEPA H13 filtration captures 99.97% of particles
- ✓Destroys formaldehyde at molecular level
- ✓Extremely quiet even at high speeds
- ✓Whole-room coverage up to 1,000 sq ft
- ✓Smart app control and pollutant sensing
- ✓Oscillating airflow for even distribution
- ✓10-year warranty
Cons
- ✗Premium price point
- ✗Replacement filters are expensive
- ✗Large footprint
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
Dyson Purifier Big+Quiet Formaldehyde
Best for those who want top-tier filtration, formaldehyde removal, and near-silent operation in a premium package. Worth the investment for large rooms and allergy sufferers.
20% Off — Limited Time, Check 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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