Dyson Purifier Big+Quiet Formaldehyde vs Levoit Core 400S — Which Should You Buy?
Side-by-side comparison of Dyson Purifier Big+Quiet Formaldehyde and Levoit Core 400S. We compare specs, performance, and value to help you decide.
Feature Comparison
| Feature | Dyson Purifier Big+Quiet Formaldehyde | Levoit Core 400S |
|---|---|---|
| Room Coverage | Up to 1,000 sq ft | Up to 403 sq ft |
| CADR | Not disclosed (whole-room) | 260 (smoke), 266 (dust), 273 (pollen) |
| Filter Type | HEPA H13 + catalytic formaldehyde | True HEPA + activated carbon |
| Filter Life | 12 months | 12 months |
| Annual Filter Cost | ~$80 | ~$45 |
| Noise Level | 24–52 dB | 24–50 dB |
| Smart Features | App, auto mode, pollutant sensing | App, voice control, scheduling |
| Air Quality Sensor | Yes | Yes (PM2.5) |
| Weight | 14.3 lbs | 10.8 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
Levoit Core 400S
Pros
- ✓Smart app control via VeSync
- ✓Real-time air quality display
- ✓Quiet sleep mode
- ✓Good value for smart features
- ✓Compact tower design
- ✓Easy filter replacement
- ✓2-year warranty
Cons
- ✗CADR lower than some competitors
- ✗Plastic build feels less premium
- ✗App can be finicky
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 NowLevoit Core 400S
Best smart purifier under $200. Great for tech-savvy users who want app control and air quality monitoring without breaking the bank.
Price Drop Alert — View Deal NowOur 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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