Blueair Blue Pure 311i+ vs Winix 5500-2 — Which Should You Buy?
Side-by-side comparison of Blueair Blue Pure 311i+ and Winix 5500-2. We compare specs, performance, and value to help you decide.
Feature Comparison
| Feature | Blueair Blue Pure 311i+ | Winix 5500-2 |
|---|---|---|
| Room Coverage | Up to 387 sq ft | Up to 360 sq ft |
| CADR | 250 (smoke), 250 (dust), 250 (pollen) | 232 (smoke), 243 (dust), 246 (pollen) |
| Filter Type | HEPASilent + activated carbon | True HEPA + carbon + PlasmaWave |
| Filter Life | 6 months (main filter) | 12 months |
| Annual Filter Cost | ~$60 | ~$40 |
| Noise Level | 31–56 dB | 27–56 dB |
| Smart Features | App, scheduling | Auto mode |
| Air Quality Sensor | Yes | Yes |
| Weight | 8.4 lbs | 14.3 lbs |
| Energy Star | Yes | Yes |
Blueair Blue Pure 311i+
Pros
- ✓HEPASilent technology is very quiet
- ✓Washable fabric pre-filter
- ✓Energy-efficient operation
- ✓App control and scheduling
- ✓Multiple filter color options
- ✓Compact design
- ✓Low filter costs
Cons
- ✗Lower CADR than competitors
- ✗Fabric filter attracts dust visibly
- ✗No particle display
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
Blueair Blue Pure 311i+
A solid choice for smaller rooms where quiet operation and aesthetics matter. The washable pre-filter helps reduce long-term costs.
Limited Offer — Check Today's PriceWinix 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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