Dyson Purifier Big+Quiet Formaldehyde vs Honeywell HPA300 — Which Should You Buy?
Side-by-side comparison of Dyson Purifier Big+Quiet Formaldehyde and Honeywell HPA300. We compare specs, performance, and value to help you decide.
Feature Comparison
| Feature | Dyson Purifier Big+Quiet Formaldehyde | Honeywell HPA300 |
|---|---|---|
| Room Coverage | Up to 1,000 sq ft | Up to 465 sq ft |
| CADR | Not disclosed (whole-room) | 320 (smoke), 300 (dust), 300 (pollen) |
| Filter Type | HEPA H13 + catalytic formaldehyde | True HEPA + activated carbon |
| Filter Life | 12 months | 12 months |
| Annual Filter Cost | ~$80 | ~$50 |
| Noise Level | 24–52 dB | 30–55 dB |
| Smart Features | App, auto mode, pollutant sensing | None |
| Air Quality Sensor | Yes | No |
| Weight | 14.3 lbs | 17.5 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
Honeywell HPA300
Pros
- ✓High CADR for the price
- ✓Covers up to 465 sq ft
- ✓True HEPA filtration
- ✓Turbo mode for quick cleaning
- ✓Allergen filter option available
- ✓5-year warranty
- ✓Proven reliability
Cons
- ✗No smart features
- ✗Can be loud on high
- ✗Basic, utilitarian design
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 NowHoneywell HPA300
Best for allergy sufferers who want maximum filtration power and don't need app control. A dependable choice for large bedrooms and living rooms.
Limited Offer — Check Today's PriceOur 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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