Winix
Winix 5500-2 Air Purifier with True HEPA and PlasmaWave
A top-rated workhorse with PlasmaWave technology — neutralizes viruses, bacteria, and odors beyond what HEPA alone can do.
Our Review
The Winix 5500-2 pairs a True HEPA filter with Winix's proprietary PlasmaWave technology, which creates hydroxyls that break down pollutants at the molecular level — something passive HEPA filters can't do. This makes it especially effective against odors, VOCs, and airborne pathogens. The washable AOC (Advanced Odor Control) carbon filter is a cost-saver — just rinse it instead of replacing it. Smart sensors automatically adjust the fan speed, and the sleep mode drops noise to a barely audible 27.8 dB. Consistently rated among the top 3 air purifiers by every major review outlet.
✅ What We Like
- PlasmaWave adds pathogen and odor neutralization
- Washable carbon filter saves money long-term
- Smart sensor auto mode is responsive and accurate
- Excellent build quality for the price
⚠️ Worth Noting
- PlasmaWave produces trace ozone — some prefer it off
- Coverage area is moderate
- No app or WiFi connectivity
- Design is dated compared to newer competitors
Key Features
- True HEPA + PlasmaWave technology
- Washable AOC carbon filter — no replacement needed
- Smart sensor with auto fan speed adjustment
- Sleep mode at 27.8 dB
- Covers up to 360 sq ft
Specifications
| cadr_dust | 243 |
|---|---|
| cadr_pollen | 246 |
| cadr_smoke | 232 |
| coverage_sqft | 360 |
| energy_star | True |
| filter_type | True HEPA + PlasmaWave |
| noise_max_db | 54 |
| noise_min_db | 27.8 |
| smart_features | False |
| warranty_years | 2 |
Best For
- Allergies
- Odors
- Best Overall